Okay so I don’t know if you’re into birdwatching at at all but that’s about the top speed of a peregrine falcon. Have you ever seen a bird of prey dive to attack?

That’s also about the stalling speed of a passenger airplane, that is, the minimum speed it must fly at before losing lift.

I couldn’t think of anything else that goes at around 300kmh but if I get new ideas I’ll let you know.