[gremy0]

hmm, I put your "plainest" language answer into XKCD simple writer, and there was some complexity in there.

In most simple language, the space truck was thrown up, not tossed forward, and this caused a sound wave that was followed with some interesting events in one of the high bits of the sky, between the space truck refuse air and the hotter-than-air stuff in the high sky, all of which need further study because of possible bad things like how true your sky-computer computer-map might be in the area around the "hole" caused by these waves.

[ziftface]

I'm actually really impressed by this, not bad

[beeforpork]

Now it is perfectly clear to me, thank you! :-)