8
xkcd #3244: Pullback Drive
(imgs.xkcd.com)
Title text:
"How does the spring not run out almost immediately?" "We pull it back REALLY far."
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3244/
i think it was a bus, and it was used in hills to get extra energy while going down and using ot while going up.
I heard about racing car having spinning wheels too, instead of br~~e~~aking before turns, accumulating energy into them, then after the turn, releasing them for huge acceleration
*braking*
If its a race car it does both