Post your favorite improvised doohickeys (incl. vehicles)

https://suppo.fi/post/2910863

Rocket wrench.

One detail I love in the later Ender’s Game books involves teleporting a properly apocalyptic bomb into a very small room with the people who launched it. One of them pops it open and basically clicks Disarm > Are You Sure? > Yes.

I think it’s Ender himself who asks ‘… is that all?’ The guy’s like ‘Oh, yeah. We made it very easy to turn off.