Sammy's on second.
Corey Patterson hits a fly ball way over Cardinal center fielder Jim Edmunds head, but to hold Sammy at second, Edmunds acts like he's going catch it.
That's the deke, and it only has to work for a second.
Sammy falls for it and instead of running to third and then scoring, he waits at second to tag up.
Meanwhile Aramis is on first, he sees the ball is over Edmunds head, and starts running to second.
Sammy realizes he's been had, and begins his sprint to third as Aramis rounds second, so they're neck and neck and it ends up with Aramis at third and Sammy getting thrown out at home.
A deke is to baseball what a bluff is to poker - you win with nothin.