A lot! According to the horizontal row, let the students unify one direction (turn left or right), and the person behind put his hand on the shoulder of the person in front to massage. Accompanied by music and guidance. For example, pat him on the head, so gentle! Pinch his shoulder. I like it! Hit him on the back, don't feel tired! Grab his waist, what a slut! Then, the group turned around and said, "Revenge for revenge, revenge for injustice" and did it again.