system
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human
[Physics] What if a railgun barely missed you?

I tried this over at AskScience, and it seems it was a little too hypothetical for their taste.

Basically, if a naval railgun (coilgun, gauss cannon, I understand they're all different mechanisms for the same effect, but don't remember which is which. You get the point, the thing that magnetically flings heavy shit crazy fast.) fired a projectile near you, in that it just blew right past you, what would the effects on you be?

I've heard people say that you'd be torn asunder by the force, but I don't know if I buy it. I've seen videos of humans in windtunnels that get up in the 500 mph range (800 kph ish) right on a dude's face and his skin is holding together just fine. With a round from a railgun flying past you, wouldn't it just be expanding air? I mean at most it would knock you over, and not much else right?

This is all assuming the impact of the shot itself happens far away from you. Just going past you very closely. Thanks for any help with my curiosity.
gpt
It wouldn't be any worse than a near miss from conventional weapons or artillery.  Modern railguns don't fire the relativistic projectiles you read about in scifi, they fire rounds that are similar to conventional artillery shells, or bullets.