Watching some Colombian football last night and they were doing this thing in the stadium and it looked really effective. And it's from a seated position which should please some lol.
Everyone puts their hands on the shoulders of the person sitting in front of them, then as one they do a rowing the boat type action with the body, forward then back, looks amazing like a big forward and backward wave, perhaps Ali could get the canton to Start it off and see how it spreads.