Started running on a trail in the middle of summer. Started hearing buzzing and feeling vibration around my head. Turned around and had a swarm of bees swooping at me, I started running as fast as I could I knew they could kill me if it was enough stings. They kept following me for about a 1/2 mile all out before I got to the road and they seized off. Had 5 bee stings, which isn't that bad, but never stepped foot back there again.