I saw a commercial for medicine last night on tv and I heard a voice that sounded like Anson Williams singing. It was I think the same song Anson sang in that ep where Potsie was doing bad inj biology so he sang about the internal functions of the body.

It is indeed "pump your blood" & its for st. josephs asprin.

i STILL havent seen it and it is driving me nuts!!!

..... i think i need an aspirin man.

Yeah, Vicki L. darling, it was from the season 6 episode Potsie Quits School!