Live, from Kalamazoo Michigan, Ergo Elvis, the troubador of pain, that hunk a hunka hurtin' tendon. Right here.
There are 3 songs in the video, performed in 2001 at a United Auto Workers Black Lake teaching facility:
1) The Work-a-rena
2) Ouch, I'm Tender (my favorite)
3) The Battle Hymn of the Ergonomic, aka, Ergonomics Forever.