Don't know what they were, but they sure hurt. My ear and neck is just as bad.... My arm started swelling and going numb. I don't know if that was from tripping and falling down a 15' embankment and rolling (must have been a fun sight). Ended up going to the medexpress and getting a shot of decadron. First time this embankment has been cut this year. Waist high weeds, thistle, thorns, you name it. I never saw or heard anything over the brush cutter.