Well...a long time ago in a less PC age, I worked for a company that made fuel systems for jet engines. They had an outdoor test firing facility that was enclosed in a wall, maybe 6 feet high, intended to protect passersby.

The chap who ran the facility had a party piece. He'd put bird seed on top of the blast wall in front of the inlet. He waited for enough pigeons to start eating the seed. Then switched on the engine. There were a lot of feathers...