What's the best way to surprise someone on their birthday? A party? A thoughtful gift? Hiding in the trunk of their car and popping out and scaring the s--- out of them?

The latter on that list is the method that a guy from Chicago chose when he went home to surprise his dad on his birthday. Needless to say, dear old Dad was pretty shocked, as you could imagine.

Caution: there's some NSFW language, as you would expect when someone gets the s--- scared out of them by their kid hiding in a trunk.