The talk show host, Neal Boortz, holds a commercial certificate for hot air balloons. Years ago, he gave rides for paying passengers, mostly the romantic passage along with a bottle of champaign.
A few years ago, he told the story of a ride that took them over the Yerkes Primate Center in Lawrenceville Georgia. I can't recall why but for some reason he had to start coming down. I don't recall if it was just time to come down or possibly getting too close to the airport. The field he started to drop into turned out to be an open area at Yerkes. Just as he was nearing ground, hundreds of monkeys were coming out of the trees and headed for the balloon. Needless to say, he got out of there quickly.