Pullback Drive— "How does the spring not run out almost immediately?" "We pull it back REALLY far."

cross-posted from: https://piefed.world/c/webcomics/p/1102757/pullback-drive-how-does-the-spring-not-run-out-almost-immediately-we-pull-it-back-really

> [XKCD #3244](https://xkcd.com/3244).
>
> [Explain XKCD](https://www.explainxkcd.com/wiki/index.php/3244:_Pullback_Drive).