"Oh, it's possible. It's jus' a pain in de derrier. I known a couple folks dat came back from de future doin' de Marty McFly t'ing. Wit' varying levels of success, so far." Since...they wouldn't know for a while if they'd managed to stop their home timelines or not. "Back home, usually done by somebody dat's got reality warpin' powers. An' let me tell you, petite. Ain't a one of dem dat ain't got more issues dan de library."