Go to the part where Han shows up in the end battle and shoots Darth Vader's wingman and the guy to vader's left yells: "Look out!". When he hits vader's Tie fighter and explodes, it looks as if vader is sent crashing into the trench wall. Yet, a scene later, he is flying away into space. How'd he do that?
First of all, his TIE fighter has shields. When he gets knocked into the wall, his shields help protect his fighter and the angle at which he hits sends him off into space spinning rather rapidly. Eventually he rights himself and flies away.
I feel sorry for whoever posted this "slip-up" because I have sympathy for the mentally challenged. Darth Vader's ship does not hit the wall, he hits the ship next to him then bounces away. The one he hits, wreaks against the wall. If Star Wars is too complex of a movie for the morons who wrote this, they should try Disney movies.