A perilous policy, procedure, etc: Nixon remained skeptical of Kissinger's high-wire act in Vietnam
[1970s+; fr high wire, an 1880s term for the funambulist's high tightrope]
It was a high-wire act to be sure, but Calvin Coolidge managed to pull it off.
Crafting humor for supersize egos can be a perilous, high-wire act.
That Elgort executes the high-wire act so flawlessly is probably owed to the fact that he shares some of the same qualities.