This thing just keeps going on and on and on. (They used a lot of electrical tape.) I'm truly dazzled at what human boredom + inventiveness can come up with. "Hey, Beavis, whaddaya think 'll happen if I put the dumbbell over here on this track?"
There's a little sound, but it's really essential to a few of the things to appreciate the level of weirdness. Keep it low if you're at work and concerned.