Seems to have dissipated now, but it was eye-scratchingly acrid. I think it might have be the house of the underground lair. The problem is that we live in a steep sided valley, so any smoke mostly collects.
OK, I confess to my own crimes, on the eve of our last house move, my wife turned up with a bin bag full over every receipt, bill, and bag statement ever. And a broken and exhausted shredder.
Boy. Fire. BBQ.
Four hours and much, much smoke later...