make a video response playing slap tennis - two people hold left hands and go back and forth slapping each others left hands with their right hands until one of you gives up by letting go
video: what's the most physically painful game you've ever played with your friends
Videodchallenge - Breathholding: Put your hand over a friends mouth + pinch her nose too and see if she can handle it a whole min or if she give up before :D