Xander, Willow and others in “Fool for Love”

[re: Riley's commando hand movements] What's with the hand move? D'you see that? Does that, like, mean somethin'?

It's code. I think it breaks down to "choo-choo." [mimics pulling a train whistle]

It probably means to follow him. That, or wait here for him.

Hey Riley! What's the [Mimics gesture] all about?

It means yell real loud, so the vampires who don't know we're coming will have a sporting chance.