When Gus is in the restaurant getting the funny glasses from the vending machine, Fleas character walks out of the kitchen and while trying to pass by with the dish pan accidentally elbows Gus in the back of the head forcing his head into the vending machine.
When Phil is running down the road chasing after his kite, two crewmembers are visible at the bottom left-hand side of the screen, running ahead of him, flying the kite that is supposed to be blowing away.
Near the end of the movie, Gus is driving the car and we see a close-up of his feet, so that we can see him driving with the stilts. There is a rip in his blue jeans, but in shots before and after there is no rip.