[Not really. That hardly explained anything. Still, Robert trusts Don's judgment for... whatever it is he does.

He still steps back awkwardly, though, when Don leaps down to the closer branches. Internally he is judging the strength of those limbs...]

I have never seen you do this before... though I suppose that, judging from your earlier exploits, it is not too unreasonable to consider this. [Climbing a building is pretty similar...]