Kory's fire-blast hits Gar on the bicep, near his shoulder. But later, the bandage is around his forearm.
When the Arkham janitor attacks Dr. Crane and they struggle on the ground, the knife that fell to the floor next to them alternately appears and disappears between changing camera shots.
The hatch to Dr. Kind's underground facility had no locking bolts visible from any side. Its perimeter was completely smooth.