Firefly Glen due to an internal explosion, it breaks into two parts

Yeah, yeah, he yawns, rubbing a stubbled cheek. Drove the lady crazy. 

Even now, just talking about it, makes him wish he had an arm to drive his teeth into. A storm to look straight in the eye. The goosebumps you got after a brush with death, there was nothing else like it. When faced with danger, his brain turned the chemical valves for exhilaration. Fear-- the kind of deep, soul-shaking fear associated with mortality, wasn't in his arsenal.

He scans the glen and its first tinges of sunrise. You ever get into fights? I could teach you someday. A quick appraisal of Yosemite would reveal that he was mired in gangly adolescence, though his comically big paws hinted at a larger frame. Nine feels a strange strain of envy, or nostalgia, or both, before it is quickly tamped down by a heel.

At the risk of sounding cliche, the past was the past, after all.