The thing about slot machines though, aside from the fact that the pay outs are not uniformly random, is that they're designed to have tons of almost-wins, i.e.

The thing about slot machines though, aside from the fact that the pay outs are not uniformly random, is that they're designed to have tons of almost-wins, i.e. "bar bar cherry". You think you're "so close" to having won that you think if you just try a couple times more, you'll really get it. This goes so far as to program the motors for the wheels to have a specific wobble, so they flip over from a winning combo to a losing one at the last second.