Zzzap is naked when he reverts

There was a twist of lightning and the figure was outside the sphere. It sank to the floor and the concrete began to smoke. The shape grew dim, the air flattened, and a gaunt, naked man tumbled to the ground with the sudden whuff of a flame being snuffed out.

Excerpt From Ex-Heroes, pg 44
Peter Clines
https://books.apple.com/us/book/ex-heroes/id585738407