SatNav

In at least one universe, SatNavs, unbeknownst to most of the population, “not only knew where things were in the current universe but also infinite other universes”. As a result, they “sometimes” told their users to drive off the roads that physically existed in their universe.

As a result of this quirk, Jenny Over-There gained the ability to know where anything in the Multiverse was currently located after an accident at a SatNav factory. (PROSE: The Tribulations of Jenny Over-There)