Policeman: pardon me young lady. I couldn,t help but notice your driving is slightly erratic..have you been drinking..
Lady Driver: Er yes I have officer..
Police: In that case I must ask you to blow into this intoximeter please
LD: Ok..
Police: Just blow one steady blow..yes thats it...He checks the result...Blimey.. you,ve had a few stiff ones..
LD: Oh no it doesn,t tell you that as well does it...
