KIC
Lets keep it civil out there, people. Sure, we all can lose our temper and feel on the defensive, but I'll propose it's best to stop and think before speaking, most of the time.
Accusing a professional cabby of not knowing how to drive when you've very likely scared the socks off of him cutting in while he crawals along at about three miles an hour (and tootled his horn at you) is, well, far from productive.
~7:50 this morning (Monday, 5 December 2011) Victoria Embankment eastbound.