I liked the idea of outfitting Zeb Carter's Ford with a "continua" device in Heinlein's Number of the Beast and programming it so it would move through parallel

I liked the idea of outfitting Zeb Carter's Ford with a "continua" device in Heinlein's Number of the Beast and programming it so it would move through parallel universes via voice command to the onboard computer. Can't tell you how many times I've sat in traffic and wished I could say "jump deety" and immediately be in the parking lot.