I was flying by the edge of my seat

This one was said on the Food Network show “Cooks vs. Cons” (season 2, episode 5).  It is a nice mashup of “flying by the seat of my pants” (to rely on one’s instinct instead of following a set plan) and “on the edge of my seat” (very excited and giving your full attention to something).  “Seat” is the common word here, and the source of the mixup.  A big thanks to Hillary Harding for spotting this one!