I didn't get home from work until 7:30 so we didn't get to witness any trick-or-treating (though we live pretty far back off the road, so we don't get trick-or-treaters anyway) but I still made a little costume for PB:
He has a little brain slug, from Futurama! Super cute.
(I considered making him a costume of the scariest thing we could think of: Mitt Romney. But I refrained.)