File away for inevitable future use.
In addition, if the hinges are on the inside, you can use a key and some other hard object to force the pins out from the bottom on each hinge. Put the end of your key in the hole on the bottom of the hinge, and use the other hard object (a brick is awesome) to hammer the hinge-pin up and out. Then the door will come free from the frame and you can strut right out. If the hinges are on the other side, that means the door opens outward from you and can be kicked open. Two swift kicks right next to the door knob often does the trick, especially in residential structures. One, if the door is flimsy.
This public service announcement brought to you by my ill-spent youth.
