"Ever hear the one about the underwater rocket? It broke the ice! ... Where are you going?"
One of YouTube's unassailable benefits is getting to see things blow up on demand. You can watch whole channels of young men with interesting haircuts pretend like they have charisma before blowing up a CRT monitor or a giant frozen gummy bear. I prefer the simpler approach. Just some buddies, a digital camera, a rocket, and a plan. You'll want to keep rewatching for that satisfying underwater boom.