He's laughing, darting from tree to tree, knowing the humans below are far too slow to ever hit him with their inferior and unimaginative weapons. But something else is happening, something he hasn't paused long enough to realize yet: all of this flitting around and and firing blast after blast has been taking a tremendous toll on his life force.

The Master lands in another tangle of branches, and stumbles, flashing to bone again. He abruptly stops laughing, his face one of bewilderment as he clings to a tree branch just in time to keep from falling.