5. Buffalo Testicles (Season 1)
While the idea of consuming testicles of any kind is sufficiently gag-worthy in and of itself, Fear Factor once again outdid itself by ensuring that the testicles served up to its poor, poor contestants are that of a buffalo. (Who knew those guys were packing so much heat?) Furthermore, the process of eating these bad boys is quite involved, requiring that contestants peel them before consuming them. It makes the whole thing a real dining experience, you know?