"If the Earth was a ball, you'd have to constantly adjust your flight path downwards."

"The Earth is not a spinning ball. It's a flat plane, and the UN logo is actually a map of our world."

"The seasons are caused by the sun moving in a spiral path over the flat Earth."

"The 'Southern Cross' constellation is a hoax, or it can be explained by perspective on a flat Earth."

"The 'gravity' that keeps us on the ground is just the Earth accelerating upwards at 9.8 m/s²."