When Nocturne says, "Are you my nightmare, or am I yours?" I'd swear I could hear the sound of someone activating their touch-to-talk Ventrillo button.
Its like a soft "gonk" noise.

Has anyone else picked this up?

Yeah, I heard it too.
I find it pretty funny actually

It is a little irritating when I'm on Ventrillo with my team and I hear a fake activation noise and expect someone to be talking.
Nocturne is trolling me.

When nocturne uses his ult I swear to god I can hear Maokai's sapling toss sound. :|

DARKNESSSSSSSSeekSSSSssss