[Icy]

If at any point during your runaway you press a directional key, your character stops immediately.

If you do this over inaccessible locations, you may not exit; if you do this over inaccessible objects, you are stuck. However, you will spawn somewhere near it when you relog.

If fail to stop your character from going all the way to the edge, ie. too far from the accessible region of the map (because you were afk, say) then you may have to relog twice to spawn properly, in Roumen.

Counter-measure: the only thing I know of to prevent this is to set up a vendor. A character in vendor mode will never undertake a runaway trip. Resting does not work. Mushroom will end up in a corner.

Trivia: you always move in the south-west direction. If you are in resting mode, your character will get up and move. If you're in vendor mode, and a runaway is triggered, upon closing the vendor you will find your character stuck in running motion - simply click on another vendor to resolve the problem.