Are those the ones that keep slamming you in the back of the head? You keep swatting at them like you’re at a rave concert and never seem to hit them? Meanwhile they just keep hitting you left and right and top of the head. If so, they had my number yesterday. It all started as soon as I got to our place and I opened my truck door. Instantly put me in a irritated moodDeer flies and horse flies are bad this year too.