Rolling. Rolling around on the floor. Rolling around on the bed. Rolling down hill.
Two-person rolling. Rolling over each other. Rolling holding each other. If not rolling, just rocking holding each other. Or both rocking and rolling, as long as you’re holding each other.
Roll Play for the minor masses includes the less intimate and notably less intense Roll Over.
You get a lot of people, like you usually did when you played New Games. You get some of them lying down on their tummies (their own tummies, you silly) with their arms and legs straight out (knees and elbows being markedly less than pleasant when pressed upon other people’s backs). Experienced players highly recommend that someone assigns a couple loose players to help the roller stay in the maximally effective, and least potentially damaging rolling position. This is your basic Caterpillar, the player on the end (or beginning, depending on where you’re standing) of the caterpillar rolling to the end, getting tight with the other segments, the next in column starting her roll soon after.
Some play that the next player can’t start until the first player reaches the end of the caterpillar, others play that as soon as the first player has reached the critical distance of say three or four bodies, the next player begins. Some also make a race out of it, with several Caterpillars going at the same time. Thus increasing the sense of competition and the likelihood that someone will do something even more stupid.
Some opine that its best to play Caterpillar on a hill (perhaps not on a mountain).
Others prefer the proverbially level playing field.