NEW YORK, NY - MARCH 01: (EDITORIAL USE ONLY) Eddie Van Halen of Van Halen performs at Madison Square Garden on March 1, 2012 in New York City. (Photo by Jamie McCarthy/Getty Images)

This is some cool stuff right here.   We decided to get into our Rat Time Machine and travel back to May 16th, 1985.

The show was Late Night with David Letterman.  And Dave had a special guest randomly sitting in with the band…Eddie Van Halen!

Check out the clip below!  The RAT rocks!

– East Side Dave

"East Side" Dave McDonald. Co-Host Of The Morning Rat Race (6 to 10 AM). Digital Content Coordinator & Producer.