When Roger is first seen seated on the plane he's dressed like Indiana Jones, and has a gold statue in his hands. The next scene the statue is missing.
As Stan goes into the cannonball position he tucks his hands inside his knees. In the close up shot of him he has his hands in front of his knees.
In the last scene when Stan goes to his study, the window behind him shows a fence and bushes, giving the perspective of him being on the ground floor. However, Stan's study is actually on the second floor.