Not sawing, but...
Were out boundary surveying a farm, and came upon a hollow stem (maybe 20" DBH, 25-35' tall) with a hole at the base.
My boss, being the board-certified braniac that he was, said something like "I wonder if anyone's home?" and wound up and put a heck of a whollop on the tree with his bush axe.
About a 1/10 second later (before the echo faded) a big ole coon shot up out of the top, came flying down, and hit the ground running! It was one of those deals where ya don't know whether to run like crazy or stand real still. It all happened so fast we just stood there agape. That beast sure looked big as it was coming in for landing. I can only imagine how :censored: up a coon-skin cap would feel with the angry coon still attached. I would still be laughing if it had zeroed in & put a scalping on Mark.
After the dust settled, and we got our wits back, I told him "Hey man... Um, howsabout not doing that any more?"
Other fun surveying was honeybees, yellow jackets, sneaky snakes, and one mad cow. Never got into or even saw a hornets' nest (plenty of lone fliers but they always seem to just do their little thing & fly on)