Often it's more subtle than just "this is clearly going to take down production in X way at some point." The issue is more like feeling that the logic is too entangled and it's going to be hard to maintain later on, or that a library should or should not have been used, or something done with threads should have been async.

So yeah, not as cut and dried as "I said it would happen and it did" but more like "I had a feeling this was going to turn out to be a pain and sure enough here I am reviewing code that represents that pain."