Zombieland

I don't think I'm going to be able to ride Pirates Of The Caribbean without worrying if a horde of zombies are going to attack...

Divector8 made a couple of custom Left 4 Dead 2 maps that sends the players on vacation that turns the happiest place on Earth into the mosty terrifying. You can take a calm, zombie-free tour of the Indiana Jones Adventure: Temple Of The Forbidden Eye ride, or if you want to elevate your blood pressure, SG-1 does a gory, multi-part tour (1 / 2 / 3) against the brain eaters, giving new meaning to "there's zombies in the employees only room".