Nice that they explain the mechanics of his survival, and it doesn't conflict with what we've been shown so far. It looks like the explosion at the end was maybe part of what he was about to "resort to". I think be breathed flame once back in season one after breaking the interior wall, as a steam release or the like...

Thunder spears. AT rockets. I'm jazzed. Erin's turned into a little MMA monster.

I'm also surprised that they decided that 'having trouble with 3-4 meters' was somehow beneath them. I don't recall the scout squad outside of team Levi ever being titan butchers...