Corrected entry: Near the end of the movie, when Jerry is holding Jonas underwater with a mop, Jonas pulls out a six-shooter (revolver) from an ankle holster and shoots Jerry in an attempt to save himself. There are two inherent mistakes here: One, revolvers don't fire under water; two, even if it had been a double-action so he wouldn't have to cock it, the hammer never moves.
Corrected entry: When Jerry is in the hospital he gets Alice to switch the charts as he believes the government officials will try to kill him. The person who gets Jerry's chart has a suspicious heart attack in his sleep and dies. The next morning the government officials come back to detain Jerry. If they sent a man to kill Jerry why would they bother returning to arrest him if they expected he would be dead?
Corrected entry: A few shots are taken from the back seat of Jerry's taxi, where you can see the driver's ID. It's clearly not his photo, nor his name.
Corrected entry: After Alice shoots Finch towards the end of the movie, Jerry is lying there, shot. Alice is screaming for help and the "Uncle no one talks about" is hollering for an ambulance for one of the wounded bad guys. Apparently everyone just forgets that these scenes take place in an abandoned section OF A HOSPITAL. Help should have been a shout away, certainly it wouldn't take an ambulance to carry the wounded away.
Corrected entry: As "Mr. Finch" walks out of his office bathroom, he has rolled up shirt sleeves. He puts one arm in his suitcoat. The next scene shows that same arm with the sleeve showing from his suitcoat.