I never thought I'd get the chance to ask this.
During Mount Rushmore, the game will occasionally say "nice nose!" as you're scaling. When does it do this? Is this completely at random, or when you complete the shots in a particular way, or what? Can any dev shed a light on this?
I know, not exactly an issue of earth-shattering importance, but it's been bugging me for years.
The other exploration modes have small easter eggs like this too (like when the announcer says "that was too close!") but those are more obviously tied to conditions.