>>12747874If we look at this in slow motion, the cube must pass through the blue portal at the speed the orange portal passes around it and therefore it displaces fuckloads of air.
If A is correct, the cube after leaving the blue portal then spontaneously goes from moving upwards diagonally at (big number) meters per second to moving at zero meters per second, which makes no sense.
It must be B and we come to the conclusion that moving portals are magic bullshit and can create momentum from nothing.