Wrong Key Stuck In Door. I dont remember Redd White changing his name to Bandit Keith. The up-and-down motion of jiggling may free the teeth that are stuck in the lock pins so you can pull out the key.
I would suggest taking the lock into a locksmith as they will have the know how tools and parts necessary to fix the issue. Try pushing on the locks face just next to the key as you pull on the key. This should remove the key fragment but it may take several attempts.
Retrieve a broken key stuck in lock.
1 DO NOT force the key out as the key could snap in the lock 2 DO NOT try and take the door lock apart yourself This is the worse. You can also take out your key from the lock in the door by aligning the tumblers inside the lock by doing so. There are several possible causes. But this method is a little risky as it can break off the key.