Look up, see how quickly the clouds are moving. It must be really windy up there too.
Or is it the buildings that are moving? Yes, the entire city is drifting sideways and to get where we need to go, we can just jump up, over the buildings and they will pass below us.
Good thing we're wearing good jumping shoes.
(Wouldn't it be even better if our legs were made of springs?
Or if our shoes were trampolines?
Or if we could leapfrog up in the air, one over the next?)