"It's just that I get nervous about heights."
Image Transcription: XKCD Comics image
[Megan is seated at a desk, in front of a laptop. The scene is rotated by 150° clockwise, so she appears to be upside down and angled.]
[Cueball enters the scene from the right side, behind Megan. He has three question marks below his head, oriented upright in frame.]
Megan: They announced that "down" is relative to Mars today.
Cueball: Ugh, I hate when they make another planet the coordinate system origin.
I think you mixed the title text up with 2799, this one's "It's just that I get nervous about heights."
Ah yes, copy paste fail, thanks; fixed it