Crowley lets go once Nico seems settled, grounded is not the right word, and shoves his hands into his own pockets, face scrunching as he thinks for a moment.

"Could probably help with that..." he muses, looking above him and around at the various branches for something more secure to stick out to him, "But I'm not sure where you'd fasten it."

Crowley supposed he could fly up higher to scout a spot to secure a line, but whether or not it would be worth it was another question entirely. Carrying Niko himself wasn't considered... Crowley wasn't sure being someone's personal parachute would do wonders for his image. Perhaps if things got desperate enough.