R1C Hale fighting mushroom clouds

A sound like thunder came from over the hill. A cloud of dirt burst up like a mushroom cloud, taller than the trees. Cannon fire? Everyone seemed startled by the fanfare, like it wasn't part of the re-enactment. Chuuya and the organizer were the only ones to keep still as the boom was followed by a second boom, and a third. One after the other...

Yeah, he could guess what that was--who that was--but he suppressed the part of his brain that cared.

[...]

Shredder leaped lightly out of the way at the last possible instant as Saxton brought his fists down. The ground absolutely cratered underneath them, flinging soil and grass to the winds in a towering geyser of dirt. Fourze winced. If they kept this fight up too long, this beautiful Xanadu was going to look like the surface of the moon. Although the surface of the moon was beautiful in its own way, of course, the towering mountains and rolling valleys...