Evening ladies and gents.

I was playing some of this game the other day and ran into a weird little glitch. I loaded the first chapter where he's on the train, and right after starting, I hit left on the d-pad and Drake takes out an invisible pistol. It can fire, but when you aim it there's just nothing in his hand. I reloaded the chapter from the main menu and the same thing happened again. Picking up guns after this are all normal. Anyone here ever run into this?