I just caught the episode last night on videotape. Honestly I was laughing at the bare feet part, but considering Jim supplies a significant portion of the venom for production of Crofab, I found this whole thread pretty amusing.
If you really want to question something, ask how a prominent herpetolgist, like Dr. Kelly Zamudio, managed to get bitten on the shin while hiking in Arizona.....by a Crotalus molossus no less. Now that is something to question!!!!