Tricks on a LONGBOARD???

I was just wondering, who does that? I've seen guys do ollies and shove-its with a longboard, and simply see it WRONG. That's like wearing running shoes while you have a sesh: It just doesn't work. I've seen a couple dudes do kickflips on longboards, and I know it's pretty gnarly, but that just doesn't fit a cruiser! They even flick the wrong way. Longboard + tricks = BAD COMBO!