I was out in our yard walking around with a backpack sprayer attacking all the weeds in our yard. It has a handle on the side that I pump periodically to create pressure inside the sprayer so that the herbicide sprays out. When I pump it, it makes a strange noise, like someone gasping for breath. I was wandering around looking for weeds pumping on the handle and our neighbor lady saw me and heard the noise that my pump was making and thought it was me having difficulty breathing. I took a break and went in the house and sat down, and pretty soon the husband came over and asked if I was alright because his wife saw me wandering around aimlessly having difficulty breathing and thought maybe I was having a stroke or heart attack. I assured him I was fine, but that I appreciated him checking on me.