In a world where gravity pulls sideways instead of downward, Keiji is standing next to a tall building, holding a helium-filled balloon on a string while wearing loose clothing. What happens to Keiji's clothing, the balloon, and his hair when he lets go of the balloon?

Provide a very brief response.
With gravity pulling sideways, Keiji's clothing and hair are pulled in the direction of gravity, appearing as if they are being blown by a strong wind coming from the opposite direction. The building may offer some shelter, causing Keiji's clothing and hair to be less affected in the area shielded by the building, but they would still be pulled sideways past the building's edge. When Keiji releases the helium balloon, it moves in the opposite direction of the gravitational pull because helium is less dense than the surrounding air. In this world, instead of rising upwards, the balloon would "rise" away from the direction of gravity, moving horizontally away from Keiji and the tall building.