At least at that height, the sh*t shouldn't hit the fan.
I remember doing a bridge lifting demo for the pongoes with our then new Chinook, as I was a keen photographer I was asked to video the event, never having used one before I set up and awaited its arrival in front of the stands,.
Despite pumping water on the sandy soil for days it didn't help and a veritable sand storm erupted with me inside it, the language I used was pretty fruity and I called the captain C...... T......... all the names under the sun, it was only when we got back and they played the tape to see my results that I realised it had sound!