Over the years one sees many things. Once myself and two other guys took three sprayers, (crop dusters), out to do a job and when we came back to the airport, there were police and a couple ambulances there, a fellow just took off in his new home built ultra-lite, got up to aprox. a 1,000 feet and it came apart, crashed on the airport right in front of his wife and kids. It was one of the most unpleasant experiences in my flying career, I'll never forget it, what a horrible thing for his family to see.