This one has a funny story.

I was riding bike down one of my favorite trails on Mt Wilson. I rounded a corner, and there was a large boulder blocking the trail. I dismounted to move the boulder. Suddenly, 50 angry bees emerge from a hole in the ground formerly covered by the boulder. A single thought flashes through my head before I am stung on many of my exposed surfaces: "F#(xING BEAR!!!"

Bear had been on the trail maybe 2 hours prior, and had moved the boulder to get at the beehive. Those bees were extremely angry when I arrived on the scene. Bear sets trap for human.