When such things happen, the best thing to do is to call specialists as no matter the time that happens to you, there is a 24-hour locksmith available to come and help you. If your key gets stuck inside the lock or you cannot get it out or worse it brakes as you keep on pulling it, the best thing to do is to call a specialist. They have specific tools they can use so that they can safely get the key out. If that is not a possibility anymore, they will change the lock.