YouTube user Banjo Guy Ollie does a pretty bitchin' version of "Enter Sandman" by Metallica on banjo and mandolin. Not because it's a tough song to play or anything like that, but he stays true to the composition and feel of the original without using any of the instruments that were used on the original.
It takes a little bit to really get going and hold your attention, but once it gets there you're all set to keep watching without looking at the clock until the end.