One of the bullets manged to get through to his leg and he let out a slight hiss before lifting the crowbar and into the writst that held the gun
The gun just flies right off his hand but it definitely wasn’t worth going back for it, not past crowbar-totin’ zombie bird over there. Joker does not notice Jason has a bullet in his leg as he’s already making a run for the door, quickly shutting it behind him before perusing the room for another strategy to use before Jason kicked the door in.