Throw Momma from the TrainGoofs
When Owen sits on the porch (with the door open), his mother sits in her chair in the living room, and Larry lies down on the rug between them. Momma sees Larry on TV and yells "There's a murderer in the house!" at which point the camera turns back to Owen, with Larry notably absent from his place on the rug. The camera then returns to Momma calling the police at which point another cut is made to Larry awakening, lying on the carpet again in his original spot.
Crew or equipment visible
(reversed images) When Larry first follows Momma on the train she turns the corner and pushes the "push" sign to open the door. When she is shown coming through it, the push sign's letters are reversed. Next, just after Larry and Owen have pulled Momma back up on the train, Owen is hugging her. When Larry asks her if she is OK the push sign is on the left side of the door. Then Momma kicks him and the push sign is on the right with the letters reversed as he starts to lose his balance. Then they show Owen get up and say "Larry," after which Larry is shown falling off the train and the push sign has moved back to the left side with the letters correct again.