it can be done. at windells last summer, my session was waiting for our session photo or whatever. 2 coaches were hiking the rainbow rail, and they started doing tricks off the lip of the jump onto the rail, going off the side of it. tom wallisch starts throwing every flip...back, front, lincolns both ways, switch front, switch back. it was so insane, cause there was barely a jump. then someone from the crowd shouted switch lincoln, and tom was like, whoa, that'd be weird, i've never tried that. so he hikes up, and stomps it first try. it was insane.