This is all really, really awesome. If it's not obvious, Marty is way too excited about all of this. He just really likes to jam out okay. He nods to Ankh with a smile. Then holy shit, that counter. He takes the opportunity of the lead, chipping into one part of the song that really sticks out to him for some reason.

Just the thought of someone waiting makes him want to sing that. Kinda weird.

Over the hills and far away,
for ten long years he'll count the days.

After that, he'll slack for Ankh to take over. He'll shoot him a grin as thanks!