Rachael vs. Guy: Celebrity Cook-Off, Season 3 Funniest Moments Save Collection Share See some of the funniest moments that happened behind the scenes of Rachael vs. Guy: Celebrity Cook-Off. 1 / 12 Photo: Todd Plitt © Celebrity Camp Cookout Rachael and Guy cracked up when they saw the celebrities' reactions after they were told they'd have to cook outside for their first challenge in Episode 1. What they thought was a Medieval Times-inspired meal just got prehistoric.