The One With The Worst Best Man Ever - S4-E22
Visible crew/equipment: While Joey, Ross, and Chandler are waiting at the vet's office, in the following flashback scenes with the duck, when Joey bathes the duck the end of the bathroom set wall can be seen at the right; and when Chandler's sitting in the canoe with the duck in the pail, a crewmember can be seen where the set wall ends. (00:19:45)