I never noticed this before, but at the very end there's a girl off-camera saying, "How did he do that?" Like you implied, he didn't say "I'm going to start a

I never noticed this before, but at the very end there's a girl off-camera saying, "How did he do that?" Like you implied, he didn't say "I'm going to start a dance party today"—just doing something in a certain social environment was all that was necessary... The human mind is a weird thing. Get a bunch of them together and it's even weirder.