Four cards — Ace through Four of Spades — and a premise that sounds like a bar bet: every card has its own weight. The lightest one turns face up on a snap, then flips back down as the next one takes its place, one at a time, in order. The four is the heavy one, and a snap won't budge it — that takes a breath. And when it finally turns over, it doesn't come back the way it left. Gary Nealon teaches Brother John Hamman's First Twist — watch it today and see how much work that premise is doing.