The ice truck is parked at the bottom of the staircase, but when the taxi drops Mr. Lawrence off, the truck is nowhere to be seen.
When Mr. Lawrence is seen running down the stairs from the fallen ice box, the shot is played twice.
The amount of ketchup on Curly's face changes after he asks Moe what blood smells like.
Mr. Lawrence's faces changes from angry to smiling when Curly bumps into him while everyone is dancing.
The position of the knife alternates from Curly's hat to the wall in a couple shots.
When Curly tells Moe he got a perfect bowling strike, Moe tells him he needs another one. In reality, a person has to get three more strikes to have a perfect score.
You can see the split in the ice block before it breaks over Curly's head.
At the end, when the Stooges slide down the stairway in fast motion, some people can be seen at the bottom, wondering what was going on. When they realize that a film is being shot, they try running out of the camera's line of sight.
The blocks of ice used in the short are obviously solid boxes that are painted white.
The sidewalk where Curly drops the block of ice is already wet, indicating that the scene was filmed more than once.
When Curly drops the block of ice after finally getting it to the top of the stairs without it melting, you can see the ground has water on it from previous takes.
Visible padding is seen in Curly's pants when he is dragged out of the back of the ice truck.
A string is visible on the knife the chef throws at Curly's hat.