I assumed terminal velocity depended on mass alone, no air resistance. So basically I'm thinking of a guy just bolting straight down from the sky like any good superhero should.

Then it would be that what I meant about cats is that they decrease their terminal velocity by doing something like splaying out. People report seeing cats fall from >40 feet distances and running off after landing with no noticeable injuries, but when falling from 20-30 feet they often sustain injury (due to not having ample time to maneuver body and slow down).