What was your favorite Radio Shark call?

The double barrel Shark and Mighty Horse calls are legendary, but I was listening to an early WJFK show tonight, and I'm pretty sure he got off another double barrel years before the XM one everyone knows. It was the episode right before Rory's last night, and they were talking about OCD, and Shark called in to derail it by busting Billy's balls. Ron called Shark out and he hung up, then they went to another caller... that I'm 90% sure they dumped out of with Ron going, "HOW COULD YOU LET HIM THROUGH TWICE" and I thought it was really funny.