Lololol this reminds me of that sketch on the Fast Show when some guy is locked out of his car and all his mates are trying to open it for him, a passing woman says that because he's got central locking if you cut a tennis ball in half and put one section over the keyhole you can 'pop' the CL in to opening the car.
They all totally ignore her until one of his mates says,"You've got central locking right? Well if you cut a tennis ball in half......."