Plot hole: When Robin and Batgirl are defrosting the mirrors on the telescope, don't you think that at least some of the beams would reflect back at them?

Factual error: If everyone had been frozen for that length of time, their blood would crystallise, which would kill them. I imagine some of the buildings and anything made of glass might crack as well, but I don't really know about that.

Revealing: In one scene where our heroes are defrosting Gotham city using the sunlight, we see Commissioner Gordon stepping from his car which has been covered in flexible icicles.

Plot hole: After Freeze blasts Robin with his cold ray he just picks the diamond out of his hand with no problem. Why didn't the diamond freeze along with Robin?