Describe what happens to the inner balloon when you release the bottom balloon.

Without the specific context or a detailed description of the setup, I'll assume that you're referring to a classic science experiment where one balloon is inside another, and the outer balloon is being released or popped.

1. Initially, both the inner and outer balloons are inflated. The outer balloon is exerting pressure on the inner balloon, keeping it compressed to a certain size.

2. When the outer balloon is released or popped, the pressure it was exerting on the inner balloon is suddenly removed.

3. The inner balloon, no longer compressed by the outer balloon, will expand. This is because the air inside the inner balloon is under pressure and it pushes against the walls of the balloon, causing it to inflate.

4. The inner balloon will continue to expand until the pressure inside the balloon is equal to the pressure outside the balloon.

5. If the inner balloon is overfilled or has a weak spot, it might also pop when the outer balloon is released. But if not, it will simply expand to its full size.

Remember, this is a general explanation and the exact outcome can depend on various factors like the size and quality of the balloons, the amount of air in each balloon, etc.