A man is pulled over by the police for drink driving, the copper asks him to blow into the breathaliser.
The man pulls a card out of his wallet which read "this man is an asthmatic, do not allow him to blow into a breathaliser signed dr smith".
The copper then asks to take him down to the police station for a blood test, again the man pulls a card out of his wallet which read " this man is a haemopheliac please do not draw blood from him".
By this time the copper was really p**sed off, "right you funny ba***ard I'll take you down the station for a urine sample" he said, again the man pulls a card out of his pocket which read " this man is a Leeds United supporter please do not take the p**s out of him".