Yep, I've got a few. Also a ditherer.
Did the worst ditherer today - I finished and while she was "getting her chequebook" I had gone back and locked her gate, put my hose away, transferred my trip cones to the other side of the street, moved my van and connect up to start the opposite house.
I went back to tap on the open door and she said "just coming". No sign so I hop across the road and do the top three windows including a bay and use the time to let them drip.
I pop back and she now has the chequebook in her hand:-
"What's the date?"
"1st November ... 2010"
"How much is it again?"
"£25.00"
(She starts writing £25 on the signature line.

)
"No; up there Mrs. R_____________"
"Oh yes, I'd better start another one!"
"OK, (through gritted teeth) I'll just do a window over the road while you write it!"
(I do a porch a door and the downstairs bay and go back over)
"Let me just write it on the stub"
"Fine, thanks, see you just before Xmas"
"Is it that time already?"
"Well it will be in just under 8 weeks - bye now!"
(I go back over to the other house to take the backpack through the garage and she's still chuntering on to my retreating back!)
Bless!