Explore the castle

Hey, it's not every day you're left alone in a fancy castle! Time to snoop! You figure anything worth finding will be hidden deep in the keep. You let yourself into a side door and find some stairs going down. You snoop, sneak, and slink your way deeper into the castle until you're faced with one last door. It looks old, rusty, and incredibly strong. You slip in. Only a moment too late, you hear the door click shut. Uh oh, there's no handle on this side! Did you just lock yourself in a dungeon? And it's not even the kinky kind? No fair!
Luckily you don't have time to starve to death, because the super rusty door handle gave you super tetanus! You die!