Lois shooting Clark/Superman using blanks (GOOF!)
Okay ever since I had first learned of it (before even seeing the Donner Cut), it always bugged me and I decided to discuss it.
Now, assuming that this would have indeed been in the movie had Donner remained on, this is a major goof of a way to reveal Superman's identity. Here's why...
1. In the first movie, when a gun is pulled on Lois and Clark and the gun is fired, Clark (Superman) demonstrates his ability to intercept the bullet. ie, he can see it and move VERY fast.
2. As shown early on in the Donner Cut of S2, Clark can indeed feel when someone/something makes contact with him. When Lois and Clark were being given the honeymoon assignment, Lois elbows him and he reacts to it instinctively, meaning he felt it.
Combine those two facts together and then when you get to the scene where Lois shoots Clark using blanks, he (with his super powers) should have seen that there was no bullet (fact #1) and also he wouldn't have felt it (fact #2), thus instead of revealing himself, he should have been like, "Hey, I'm not hurt!" or something else, showing surprise that he wasn't hurt and wondering why.
A better way to 'catch' him would have been to do something like swap out his glasses for a pair she KNEW had plain glass for the lenses, so she could point out that he obviously didn't notice a difference (I wear glasses and believe me, you KNOW when your lenses are different). So, if he doesn't NEED to wear glasses, why not just take them off? Swapping them wouldn't be that hard, just pretend to spill something on him and grab the glasses (again, as she did earlier) to clean them but then hand him back the fake pair, perhaps more in a "not really paying you any mind" way so he doesn't feel like she's noticing anything so he just accepts it as being innocent. After a minute of not noticing that the glasses are different, point it out to him and the fact that they look exactly the same (with exception to the glasses) and he's caught.
Granted, it can't be changed, especially now (over 30 years later, RIP Reeves, etc) but just felt it should be brought up.