Random thought, but how do you think the tunnels would affect somebody who is a) nonhuman, b) has, well... cartoonish anatomy, and c) normally is capable of flight?

Would the tunnels just limit the super special abilities of such characters? Like, no super speed, but can still at least hover, that sorta thing. I imagine that if real world physics applied to a pony like Dash all of the sudden, she wouldn't be able to walk. XD

It also makes me wonder how the tunnels would affect chars that need magic to survive. This doesn't apply to Dash in particular, but it crossed my mind.