Judas Priest performed ‘Breaking the Law’ on 'Late Night With Jimmy Fallon' Friday (Oct. 7), but the leather-clad rockers weren't done yet. They stuck around for another number after the show wrapped, performing their 1982 smash, ‘You Got Another Thing Comin’.’

A favorite among fans, ‘You’ve Got Another Thing Comin’' was ranked fifth on VH1’s Greatest Metal Songs list and was the British rockers' only charting song in the U.S. The blog on Fallon’s website boasts that this web exclusive “will rock you!” -- and after watching the exclusive, you may have to agree.

One look at members of the studio audience banging their heads is evidence enough of their satisfaction, and Fallon has this funny, almost surprised expression on his face at the finale. If you listen closely, you can hear him gasp, “Oh my God, oh my goodness" -- which, considering his level of success, restores faith that even in showbiz a good performance can bring out the ‘fan’ in just about anyone.

Watch Judas Priest Perform 'You've Got Another Thing Comin'' on 'Late Night with Jimmy Fallon'