They say we know time-travel will never be invented because, if it were, we would have tourists from the future all over the place by now. The following prank by the improve group Improv Everywhere uses the complexities of the space/time continuum to mess with a subway car full of commuters.

(Ed. note: I've ridden the subway in NYC. This is the least weird thing you'll ever see on one.)

More From KLAQ El Paso