OK, what you guys already said :-)
I only heard this one last week and it had me guffawing loudly and keeping my wife awake.
[SPOILERS]
I tell ya, the image of the zombie sitting dumb in the go-cart, and the image of the zombie sky-diving, still make me laugh out loud. And the protagonist was such a loser! "One of you needs to get a life" -- oh, must be dead dad!
Ben's narration was great.