Those singing Quizno's monkeys.

I think the Quiznos press release sums it up better than I can: The new creative campaign is completely unexpected…even for Quiznos. “The first time you see the advertisement, you might ask yourself, “What exactly was that?” Our intent was to grab the consumers’ attention. By the second time you see it, we guarantee you’ll be singing along,” said Quiznos Chief Marketing Officer, Trey Hall.

Nico, who thinks they're mice, or something, is still in the "What the hell was that?" phase. I however, have moved on to singing along...I tried searching for the guitar chords, but instead found this cool pre-Quiznos thing.