'Here, give me a hand with this trestle,' he says.
So I help him position it across two ladders, as high as I could reach. 'Dad, this trestle is a bit wobbly,' I say rattling the aluminium plank up and down.
'Oh well, that'll just keep me awake while I'm up there,' he jokes, making no attempt to stabilise it.
You can't keep a good man down, I suppose.