With any hero you can get out of the map using Warpstone on the "Cursed" Billboard. You get to the very edge of the billboard's backside, and crouch to be stuck at a crouch position and Warpstone forward. Works with any hero.
See video of me performing that attached.
@Yoshi
In a match where I was being followed by the whole enemy team I found out an interesting bug that makes you stuck on the floor with only being able to use W and S and move only by pointing your mouse towards where you wanna go. So I went to test it out on the Hero Testing map. It appears if you...