When Scott walks away eating the apple he's stolen, you can see him stop at the corner and throw the apple core away. In the next shot he's holding the apple again, takes one last bite out of it, and throws the core away a second time.
Conversations in a car seat show the front window missing and the car cut open around the edges.
Marjorie Sutherland tells Linda she wants another glass of root beer and Linda lets her have half a glass more. When Marjorie comes out of the kitchen with her glass in hand, it has water in it.
Unlike his illustrious predecessors in the Invisible Man series, who were required to remove their clothing after achieving personal invisibility, Scott's clothing also gains the remarkable fourth dimensional ability to pass thru solid objects equally as easy as its wearer.
After Tony and Linda enter the ruined building, a mic is plainly visible on the right, sticking out from behind the door.
The actress playing the bar girl that smokes and drinks with Scott is wearing her wedding and engagement ring on her left ring finger. This is out of character for a bar girl, even if married. A married bar girl most likely would have no scruples about temporarily removing her rings to improve "business."