That was a really neat, cool, interesting vid to watch. Watching that mal tightrope reminds me of how a stick bug and some chameleons walk on a plant. And the one walking the stairs has better posture than many bipeds. Lol
My guess, holding the rope in,his mouth helps him either to balance and/or keep spacially aware of the two tight ropes. Maybe like whhat a walking cane does for a blind person.
Thanks for posting and,good to see you. :-)
"If you can't see his soul when you look in his eyes, then you need a seeing-eye dog"