Used to fly fighters. One of our unofficial 'mottos' was "One pass, haul ass", i.e., you never want to circle around and fly over a target area twice, because the anti-aircraft gunners will be alert and waiting for you the second time. I apply that philosophy to mowing hear hives.
Too funny! When I pass slower with the engine on low they seem not to mind too much and think the vibration irritates them more than the exhaust. I did put a tarp on the ground in front to kill the weeds off so not to get so close. I started placing my hives facing the woods and has helped in the other areas I have hives to keep them calm and my buddy says it works as they don't chase him like they used too.