He expected me to put the ladder up to the gutter, climb up the roof without a cat ladder, and replace a tile up near the ridge.
Dai,
You should have declined, but offered the services of your ladder to the 'Cheeky Monkey' so that you could watch him do it himself, say for 3 quid.
If he accepted, I'd've waited till he climbed on the roof then took my ladder away and argue that that that the charge was only for a one-way climb up them, and it was another 20 quid if he wanted to come down.
Would I honestly have done this? If I thought about it at the time; yes; without a doubt.
I would've had a bit of fun with him.