Our April Fools' prank where we swapped hosts with Jimmy Fallon and 'The Tonight Show' took months of top-secretive planning, and coordinating two staffs of writers, producers and guests on opposite sides of the country. People have been asking how we managed to pull it off without anyone knowing. Jimmy Fallon flew in on Thursday, and we kept cameras rolling throughout the next two days to capture the behind the scenes from the freakiest Friday in recent talk show history. Watch Jimmy Kimmel Live! WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.