(going to call this one a coin toss, thety both are going to take damage from the explosion and matt may pass out due to over use of his powers, evan shouldn't be too far behind p-assing out and has a fall to take on top of the explosion)
heads - stand up
tails - pass out
So i tossing a coin twice, once for matt and once for evan - it could be a tie...
matt - tails
evan - heads.
As matt loses what little control he had he lets go of the building, he staggers back while holding his head, in a few seconds the explosion goes off, causeing matt to fly back hitting the ground with a roll, as he stopps he is clearly passed out. his cloths are burned and ripped, the roll causeing the fire to smother itself.
(I'm not sure how active evan is, but if he wants to post he can, otherwise it can be assumed he gets back up.)