I saw a short video yesterday and thought, "Hey, we should have a thread for this kind of thing. Just an aggregation thread for science-related bits that probably aren't worth having their own thread."
...then I decided against it and moved on. But now today I came across another cool video, so what the heck. I'll kick it off with it (again, it's a video for those of you who are at work/on slow connections and can't view videos):
Nasa shoots BB into water at 20x the speed of a bullet.
I'm amazed at the amount of displacement, though I wonder how much (if any?) is actually caused from gasses/air escaping the "gun." The vaporization of water upon impact is also quite interesting.
...I'll have to go back and see if I can find the video I found interesting yesterday. Can't even remember what it was now.