If Kofi is standing upright and holding a helium balloon on a string in a room with no wind, and he does a handstand, what happens to the balloon?

Provide a very brief response.
When Kofi does a handstand, his orientation relative to the room changes, but gravity still acts downwards towards the floor. The helium balloon will continue to float upwards since helium is lighter than air, and gravity pulls the heavier air down, which pushes the balloon up. Thus, regardless of Kofi's position, the balloon will still rise towards the ceiling, and the string, if long enough, will hang downward from the balloon towards the floor, now towards Kofi's feet since he's upside down. If the string is not long enough to reach Kofi, it will hang in the air, still pointing down due to gravity.