It gives the appearance of butterflies flying up the walls.

A power of Butterfly must be -
The Aptitude to fly
Meadows of Majesty concedes
And easy Sweeps of Sky -

I have butterflies in my stomach, but at least they're all flying in formation.

Hundreds of butterflies flitted in and out of sight like short-lived punctuation marks in a stream of consciousness without beginning or end.

It's louder. It gives you a lot of butterflies. Because they're sitting on top of us, so you can just feel it, get the jitters on your back and all that.

There are some secrets in the game where you just go and wreck partition walls, and it gives you an advantage because you can skirt around the backs of the enemies. We're using [the environment] as much as possible. We didn't want to make a game where, you can just kind of shoot through the floor and make a huge floor and just keep going until you got to the end [of the level]. We just wanted to make something that was just really cool and exciting and destructive, and where possible, we could [allow for] the destruction to hurt your enemies any more.