Simple, but fast and fun to play.

Intro/Sort-of Chorus
G|-----------|--------|
D|-----------|--------|
A|-----------|--------|
E|-5-5-5-555-|-3~-5h6-|

Main riff
G|-----------|
D|-----------|
A|---55/8877-|
E|-77--------|

End it with a slide down from the B. And if you wanna throw in a few variations to make 
more difficult, be my guest.