The Final Countdown is another one that always creeps in there.
There was a perverse dance hit when I was in primary school that randomly creeps in there. It was called Reach Up, by the Perfecto Allstars. I can't find a sample of this to listen to anywhere online at the moment, though.
No Good by Prodigy, the chorus bit, that regularly comes into my head. Same with the slow bit of Killzone by Malevolent Creation and the live version of Cannibal Corpse's "A skull full of maggots".