system
Given the following post, respond as if you're commenting on Reddit:
human
Could a bee inside of a balloon change the direction of the balloon's movement?

Hypothetically, could a sufficiently large bee inside an air filled balloon (ignoring gravity) lift that balloon off the ground or move it around? Would the bee's movement inside the balloon just cancel itself out, since its lift is pushing against the opposite side of the balloon? Does bashing against the side of the balloon cause it to move?

Clarification: I meant to say that gravity still exists for the purposes of the question, but I didn't want anyone to try specifically prove that a bee couldn't lift a balloon against earth's gravity (that's not the interesting part of the question in my mind).
gpt
There are several possible mechanisms:

* Spin the balloon (e.g. by walking around inside it). The Magnus effect will then cause the balloon to respond asymmetrically to turbulence.

If there is gravity, but the balloon is zero buoyancy at rest, the bee can control altitude by flying around inside the balloon.

* When the bee flaps its wings, it causes turbulence within the balloon.
* This eventually is dissipated as heat.
* PV = ρRT, so increasing the temperature of the gas inside the balloon will increase the gas pressure, causing the balloon to expand, lowering the gas density.
* This will cause the balloon to rise. 
* When the bee stops flapping its wings, the balloon will cool, and slowly descend to (or below, due to leakage in the high pressure state) its original altitude.