Two items...
1. A homicidal pilot who has a Top Gun flashback moment and hits the pass eject button.
And
2. I don't suppose running down to Petco and grabbing a bunch of parakeets to huck into a jet engine for bird ingestion tests would fly.... Could use pigeons in NYC if you had a net, but they would run into consistency issues. Is there a medical supply company with scientifically identical pigeons for testing?