Walking around can be hazardous, specially running. People have loads of stuff
with them, heavy armours and low dex and still manage to run from one city to
the next in an amazing 2seconds or so. There should be dexchecks in every room
to see if you happen to trip and fall down. And if you trip without a helmet
on there is a possibility of dieing instantly, or atleast being paralyzed.
Specially if other people run through the room ( over you perhaps?) while you
are falled down.

Ofcourse, while you are fallen and try to move around, it should cost 10-20
times as much eps since crawling takes much more energy than walking or
running. This would make traveling a real challenge! Imagine hearing tales of
legendary runners, awing newbies. "Yes young warrior, i once saw Walker
himself, he ran from Arelium to crimson and back without dieing!"