I questioned them on many problems I had with their model. For instance, if the earth is continually accelerating upwards, wouldn't that mean that eventually we would be moving at the speed of light? No, I was told. Answers differed from a flat earther to another. Some said the earth would eventually slow down, which, I guess, means we will one day just fly away and get lost into space, or something. What I love about all this is how it makes your mind work out on figuring stuff out with new parameters. For instance, moving at the speed of light, you would be unable to see anything directly below 90°, because the light rays wouldn't be able to catch up with you! [Upon further reflection, I think you would see absolutely nothing unless you were looking upwards, since even light coming from the side would not have time to reach your eyes, or maybe you'd see things in front of you that in reality are much higher in space; the light from them, going horizontally would hit you in the eye as you move up. This is hard to explain, I hope you can figure it out.] In theory, nothing can top the speed of light, so I assume we would float away at this point.