So I just died to absolutely nothing while I was playing Tyto in Gigantic. I was behind and to the left of Grenn and running towards him. That's about where the wall closes up when the final clash hits, which I'm pretty sure is why I died. As soon as Grenn announced the final clash, I dropped dead at full health. It was a 4v5 and we were done anyway, but it was still pretty tilting. It happened pretty quickly, so I have no idea how to reproduce it, but I'm guessing you'd just stand in that corner of the map where it changes when the clash happens. In my case, I was sprinting and just happened to be in the right spot to die.