Because I almost managed it today!!!
Was driving the old family truck this evening around a left hand bend and Mr "I'm Better than Rossi" came hurtling around the corner, leaning right over with his head 3 feet over the centre line!
I know I made an eeking sound, I can only imagine he inhaled his bike seat through his arse as he did a turtle impression to avoid providing me with a new ornament on the bull bars!
He did manage to straighten up and not ditch his bike and himself though, good bike rather than good rider I think!