As there was in the Smart Moving Mod, the alternative animation of Flying. That allowed you to fly as if you were swimming, being able to pass through 1 block, and fly where you look (like when you swim).
It was a mechanic of the Smart Moving Mod that was one of my favorites, since you flew like a Super Hero, and it also reminds me of the other mod called Do A Barrel Roll.

Here is an image/gif of the Smart Moving Reboot flight