I saw a documentary or movie about a long time ago (8-10 years ago), where it delved into the to sort of moral or hypothetical situation about space-time or something about that. EDIT: (Most likely of something of high production value, considering it was a long time ago and it looked realistic, at least in the view of my younger self :P)
There is this one scene where the scientist (of Asian descent?) creates a portal of a parallel universe, then holds up a gun. Walks up to the portal and points the gun to a version of himself in that portal. The other version that he sees shoots him and he dies I believe.
There is another scene where there is a whole animated part, where a bunch of marbles is rolled out (on a wooden floor) and then are somehow magically spaced out. I think this was to demonstrated entropy or gravity?
This two scenes might be from two completely different things because I think my dad was watching this from youtube, but hey its worth a shot!
Thanks for any help!