I had an absolute shedload of TW yesterday. 8 bookings, 2 cancelled, 2 showed up, 4 no shows (all of which I'd pegged beforehand as being unlikely to turn up, so at least my instincts were right!)
The most breath-taking was the guy who called me at noon and made a booking for 7pm, who I asked to confirm at 5.45. He didn't, which I had expected.
He then called me at 7.05pm, 5 mins past the start of the booking he'd made, and tried to book me again. Wasn't he surprised when I gave him both barrels!