Horse crap on the bike path in two places about a mile apart. In each case, someone had picked up the horse crap and used it as a paperweight for a note that read "Pick up your horse crap."
Saw a headless pigeon sitting upright. Posted about it here and many people said some hawks particularly enjoy bird brains.
Half naked woman (bottom half) who had dropped her pants to relieve herself. She didn't bother walking into the woods, just squatted at the edge of the MUP with feet still on asphalt and backside hanging over grass.