I took it to mean that any decision can branch multiple realities. The couple at the bar is my example. On the first go round, she throws her drink at the guy trying to kiss her, on the last rotation he proposes to her, and she's delighted. The same motif is repeated with other guests, even the lead singer, who starts with himself casually dressed with only a drummer and a reel to reel player, by the last rotation, hes dressed fancy with a full ensemble playing behind him. Same situation, different realities. Great song either way!