I saw this video on Facebook about twenty minutes ago and laughed hysterically   This is by far one of the funniest ones I've ever seen.

Flickr- JoshBerglund19

This internet prank is probably one of the best ones ever.  Basically the guy had to do karaoke in exchange for free gas.  This fella goes way further than needed and it was priceless.  The dancing, funny comments and song selection is legit.  You have to watch it to understand.  Enjoy!