While Stan is outside, Roger apparently takes off his leather outfit.
When Stan returns inside, the interior shot shows Roger and Stan with the outfit on the yellow area rug.
The shot cuts to a close up of Stan but when the scene cuts back to Stan & Roger, Roger's outfit has moved from the area rug to the blue carpet.
When Stan returns to 'Bananarama' he enters Roger's room via a river raft ride.
We can see the river only flows one way, (as the camera sees it) entering the room on the left and exiting on the right but when Stan is forced out of the room, the river is suddenly flowing the opposite way.