How come Superman can get hit by bullets and live, but he ducks when someone throws a gun at him?

lolHow come Superman can get hit by bullets and live, but he ducks when someone throws a gun at him?lol were was that from i have to see that.......haha wow that's hillarious...the man of steel is scared of steel....How come Superman can get hit by bullets and live, but he ducks when someone throws a gun at him?He is bullet-proof, not gun-proof.How come Superman can get hit by bullets and live, but he ducks when someone throws a gun at him?that's what the director want or maybe he is just super stupid