It's not flat...

Did you know that the world is round?

Honestly... It's not flat, it might look it, but it is most definitely round.

If you keep walking in one direction, you'll always get back to where you started. You'll not fall off the end.

Hold on...

Maybe it's shaped like a banana and we've only walked round it's girth. Might fall off the end if we walk it lengthways.