What Happens to a Helium Balloon in Freefall?

The video presents a challenge question related to gravity, inspired by a previous episode and a video from Smarter Every Day. The scenario involves a helium balloon in a minivan that is dropped off a cliff. Viewers are asked to predict the balloon's behavior in a vacuum. Answers should be emailed with a specific subject line for a chance to win t-shirts. The solution will be revealed in the next episode.

What new insight or understanding did you gain from this video?