Damsel in distress ... and Dudley Do-Right

"This has always bothered me ... On the Rocky and Bullwinkle cartoons, there was a segment with Dudley Do-Right. The damsel in distress (often, Dudley's girlfriend, Nell Fenwick) is always tied up by Snidely Whiplash and laid on the railroad tracks, but is never tied to the tracks themselves ... why didn't she just save herself by simply rolling off the tracks instead of waiting for Dudley Do-Right to save her???!!!"