Jo was just plain about to give up on trying to find a truck because Mr. Green-boom-clang-smash was just ripping up everything in sight. And if he wasn't, the weirdo electro-redhead was covering that. Between the two of them, it would be a miracle if the block ended up surviving.
Spotting a nearby truck, Jo muttered something along the lines of 'screw this' and threw her stuff in through the open window. No keys in the ignition though, curse her luck. Hot wire it was. She just hoped that she remembered how to do it.