Just found out about this (it's been around for years but I'm out of the loop...) and it seems like a fun thing. Could be a way to change up a workout, or could even be a team or challenge activity. In October, groups of people all over the world will dance Thriller at the same time, to try to set a Guiness record. It's the 30th anniversary of Thriller (already? gosh I'm old...) Anyone can join in, or just learn the dance. I've been watching the Youtube video although I'm no dancer, and it looks doable. Participants are encouraged to warm up, and to modify moves to prevent injury. The website is called Thrill the World. It would be fun to be able to do that dance!