Ogma. (06-18-2016)
As you know you can teleport almost anywhere with reaper. Blizzard in the patch notes fixed almost all of the spots to get outside of maps, except this one which they failed to patch. I just did this in a public match and contested the point and won. Have fun, here's a tutorial for you all.
This is not my gameplay... Have fun!
Ogma. (06-18-2016)
Haha cool, hard as hell to do it and you get kicked for inactivity pretty quickly. I don't see much of a benefit from this exploit unless you get really lucky.
It's probably my sensitivity that makes it so hard to find that exact spot, or I probably just suck. It's definitely an amazing exploit if you know how to do it reliably is what I am saying. The few times I did it I was kicked for inactivity despite shooting and moving. Just my opinion.
Yeah, create a custom game/or with AI if you want to experince more indepth with people having a possibility of shooting at you while doing it to fully master it.
Good luck.