Jonno if it makes you feel any better I worked with a girl many years ago who locked herself out of her car and house at the same time.
To set the scene the said girl who was only dressed in a nightie and dressing gown decided to warm up the car whilst she got dressed.
Unfortunately after starting the car, with choke on all the way I must add, she got out and locked her keys in it. Here it might be appropriate to state how good deadlocks are, but not however if the front door is shut and your keys are locked in the car, which if you'll remember is now running flat out with the choke on.
A trip to the neighbors and an embarassing call to her husband followed by a short wait on the front step in her jim jams got everything sorted in the end.

Chuck Norris counted to infinity.
Twice!