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I posted this image on my page that I found on Facebook which shows Toph from the Last Airbender fighting off the Weeping Angels:

toph

Is this even possible?

Wouldn't the Angels just keep advancing due to the fact that Toph cannot see them?
Or do the Angels stop when they see that her eyes are towards them?

How does anything work here?

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4 Answers

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I think basing the Angels on the episode with the crack (The Time of Angels) is very faulty. Basing it on the established rules of their first episode they appeared in (Blink) seems to make more sense.

I mean, think; they feed off potential energy (Time of Angels) rather than time energy (Blink). Well, potential energy's everywhere, so it doesn't seem to make sense that they need to hunt - simply standing near a planet would do.

In Time of Angels they say "the image of an angel, itself becomes an angel", which is ludicrous. That kind of thing would mean anyone that ever looks at one (not just Amy) should have been infected. Standing near water or a mirror should also create one. The amount of infinite regression is staggering to the point of lunacy.

In other words, I'd just ignore that whole episode for Angel motivations and abilities.

By doing so, we can easily work out what "being observed" means. It can't be the strict quantum mechanical "observed", because that refers to when any particle interacts with another particle - regardless of whether there's a consciousness behind it.

"Being observed" in this case seems to refer to conscious awareness of location. Simply remembering where they are doesn't count. It must be straight up knowledge.

At the same time, Angels must take care not to observe each other (another losing point for Time of Angels, as that many Angels should be slowing each other down through observing each other). Since we can rest assured that real-time knowledge of location counts as observation, this means that alternative forms of obversation also apply to Angels observing each other.

This means that Angels either lack sensation of vibration (else two Angels simply standing near each other would be unable to move), or can move without causing vibration. I'd more likely side with the later, which actually makes some sense, since the Angels have wings and thus perhaps "float" towards their prey.

This can be explained by the fact that, being creatures of quantum nature, they don't fully exist when not observed, and thus don't have feet to step with - only assuming the image of an angel when observed... an angel already on the ground.

Oddly enough, this would suggest that when characters "hear" an Angel, it is the Angel wishing to be heard.

So I don't believe Toph could stop Angels, as she would likely not sense anything - being that they aren't actually touching the ground. Should one become locked, however, while touching the ground, the only way to know if Toph could stop it from becoming unlocked again depends on what the Angels are made of. If the Angels are made of the "earth" element, she could stop them, as she would then sense their full form, and is observing THEM. If they are not, Toph would simply detect that the earth they are standing on is no longer being stood on. As we have said, memory of where an Angel is cannot be used to lock them, and so detecting that "they are no longer there" does not count as observing.

An odd question arises now - time delay. What is the difference between seeing and remembering what you saw? It takes light a certain amount of time to reach our eyes. Theoretically, you are only remembering what has happened. But since we know that remembering where they are does not count as observing, we must assume that there is an observation window of time.

This would allow Angels to move outdoors. Without such a window of time, Angels could never traverse the surface of a planet, as sentient beings (an established fact in Doctor Who as existing) on other worlds that look up into the sky would count as "observing" the Angels (even if not aware of it).

Thus, I believe a blind person would be helpless against an Angel just as the plants around him or her are held equally helpless.

(posted from my response on G+, thread by Doctor Who)

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Or simply one is not to think about weeping angels too much. While in Blink the angels end up in a deadlock ... stonelock (?) ... when the TARDIS vanishes and they look at each other, in "The Angels take Manhatten" they don't have a problem closing in from both sides of the corridor without ever bothering to cover their eyes. And while the statute of liberty being an angel is amusing, it's highly unlikely it can walk all the way from liberty island. Season 2005:7 seems to make a point of being aribtrarily dumb. –  user1129682 Dec 22 '12 at 18:24
    
Blind people time energy farms! –  Thom Brannan Apr 6 '13 at 1:25
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In "Time of the Angels", Amy survives by looking like she can see the angels and get out alive. As long as Toph looks like she can see them, she is safe.

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Eventually the angels "catch on" that Amy isn't using her eyes. The angels transform to their solid rock state as a defense mechanism, not just when they are seen by others. They do have control over the ability. –  Force Flow Nov 15 '12 at 16:05
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The Angels normally move despite their tiny vibrations because normally their prey cannot sense them in this matter. It is being observed that matters. Toph, who can observe them in this manner and thus can never 'turn her back' would render the angels mere statues for as long as she was near them. She could then smash them to pieces with her awesome earth-bending powers. However, in some episodes we see that powerful angels can fly. In this case Toph would be unable to observe them and would be instantly defeated.

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When did we ever see the Angels fly? –  The Doctor Nov 15 '12 at 21:03
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Before "Angels Take Manhattan", I would have said yes, but since then, when they ruined what constitutes observation, I'd say no. It appears hearing them does not count as observation for whatever reason, so all they need is darkness, and I would imagine blindness would be good enough.

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On the contrary, The Angels Take Manhattan re-establishes canon that was established with Blink (but was thrown out of the window with Time of Angels). –  Mr Lister Nov 15 '12 at 17:00
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On the other hand, it's entirely possible that the Earth-bound Angels are a different species of Angel than the ones on Alfava Metraxis. –  Mr Lister Nov 15 '12 at 17:02
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