I once met a guy on a first date who in an attempt to impress (no doubt) said to me "I'd like to take you outside and **** you over the bonnet of my Porsche".
I put on my best hoity toity look and said "tsh, porsches are just so common these days", then legged it out the fire exit when I went to the loo. I was in a cab on my way to Kings X before he even noticed I was gone.