system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that when I smack a mosquito in mid air with my hand it just flies away as normal? Surely it's like me getting hit by a bus.
gpt
I have a feeling that this has more to do with aerodynamics than simple collision physics.   The boundry layer "thickness" near your hand is huge compared to the size of a mosquito (versus, say, your face).

Imagine if you were submerged in the ocean, and a mountain-sized wall tried to "swat" you... there's a good likelyhood that the water rushing around the wall would simply move you a good bit out of the way (or at least accelerate you in the direction of its travel) before you actually made contact with it.