system
Given the following post, respond as if you're commenting on Reddit:
human
[Genral] If time were stopped and a certain object (car, person, etc...) moved through space, would it push the air and photons out of its way? What would the moved through space look like afterward?
gpt
If time were literally stopped, and not slowed down 1000's of times, the moving object would be effectively moving at 100% lightspeed.  This either means it now has infinite mass, or is like light and completely massless.

If it has infinite mass it's well over the mass needed for any schwarzschild radius (so will instantly act as a black hole), which ive never really seen a speedster/time manipulator do inadvertently, so we could go with option 2, which would be time going reaaaaly slowly, in which case they'd be just going hundreds of thousands of meters per second - there'd be massive shockwaves as the air being pushed out of the way would have incredible momentum added to it.

again, that's not really something i've seen.. so that leaves secondary powers/mutations/whatever.  

They probably have a secondary power to smooth out how their powers interact with the world - allowing them to either completely stop time without turning into a blackhole or turning into light, and move things around without massive shockwaves and temperature changes crashing around them.