Following on from Beeman's comment about leaving a laptop atop the 'blance and having it run over leading to a nice cuppa and a chat..
About 1982 I was working for MK Borough Council for the landscape dept. It was a bad year for wasps and we could not get the wasp destroyer out to us when we encountered them because he was too busy on peoples houses etc. Tidying a hedgerow we got twatted by wasps so dumped a pint of petrol into their 'ho;e' threw in a match and retired to work another bit of the hedge. About 20 mins later bells and sierens as the fire brigade arrived to douse down a garden shed that had spontaniously combusted... Oooops
Seems the guy was a carpenter and all his tools were in the shed as he was on a few days off.
Tea and cake with the foreman and manager followed.

Somehow we kept our summer jobs - good job the old lady who's garden we torched a few days later by the same method did not complain - she thought we had burnt off all the weeds on purpose.
R