Continuity mistake: When Bugs tells Sam to be sorry, Sam says "Oh no!" and you can see Bugs is holding his book with his right hand. A couple of shots later, Bugs now has the book under his arm.
Continuity mistake: When Bugs tells Sam he's going to radio the authorities, he takes his book along and on the front cover it reads "Learn to Fly." But when Sam goes to retrieve the book after Bugs throws it out of the open door, the wording is missing.
Continuity mistake: When Sam falls out of the plane after Bugs pulled the cord, Sam panics and he is drops his guns in the process. But when Sam tells Bugs he is taking over the plane, his guns have suddenly re-appeared.