I'm going to have to say the Mayonaise milk shake from the mayonaise kitchen in Japan. I hate, hate, hate the stuff and actually gagged when he drank it. Second runner up has to be the blood pudding in Iceland, that was just foul. Tanzania had some foods that were pretty awful as well.

dont remember where it was... but the sea snails in a bottle...YUCK!!! i cant believe he actually ate those!!