Sorry, not quite sure how to format spoilers so I tried to keep the title vague.
Here's for the new Thor movie (just watched it last night):
How did Loki fake dying (and managed to fool Thor, the reinforcements who found his body and possibly Odin since he would have wanted to see the body after it was brought back)?
Also, in the end, he's shown to have pretended to be Odin on the throne while talking to Thor about Thor's decision to stay on Earth. Where is Odin and how did Loki manage to do this? Did he do something to Odin?