Star Wars Episode 6: Return of the Jedi - Shield Generator
When Han Solo is about to blow up one of the shield generators he shouts, "GO, GO!" at this point, look behind him and you will see his reflection on the protective plexiglass behind him.
It's definitely there ... but it looks like he runs right through the spot where his reflection shows up a second later. Is that really plexiglass or just a 2-layer scene with bad copying?
Why would there be protective glass, it's obvious that the actors aren't involved in the scene with the explosion so they wouldn't need protecting. What I don't get is that he runs for about five seconds and then the explosion seems to blow half the forest up. How did he not get hurt?