[Happy Monkey]

Laboratory studies also found that the squirrels fly at remarkably high speeds and have a puzzling ability to control their acceleration throughout the flight. However, the recorded speeds vastly exceed those that could be generated by a glide itself. Somewhere in the flying squirrel’s little body resides a mysterious mechanism that, without the power of flapping or internal combustion, generates exceptional lift, comparable to that of powered flight.

I suspect beans.