I got as close as I ever have last Wednesday night (Jim gone teaching after being home during Spring Break last week) to negotiating Charlie out of having a wall-smashing, desk-clearning 'behavior.'
(Now that is a euphemism!)
I'm very proud, via listening to what was said to him, that Charlie worked his way through feeling ex-treme-ly anxious at 7pm, with 2 1/2 hours more to go before Jim came.
Also. I ended up buying a huge bottle of ketchup and Charlie just used as much as he needed to drench one plate of French fries, rather than the whole bottle.