only if the runner slides feet first. Ted Gin dove backwards....

Article 1: Dead Ball Declared. An official shall declare the ball dead and the down ended:
(a) when a runner is contacted by a defensive player and touches the ground with any part of his body
other than his hands or feet. The ball is dead the instant the runner touches the ground. A runner
touching the ground with his hands or feet while in the grasp of an opponent may continue to
advance; or
(b) when a runner is held or otherwise restrained so that his forward progress ends; or
(c) when a quarterback immediately drops to his knee (or simulates dropping to his knee) behind the line
of scrimmage; or
(d) when a runner declares himself down by sliding feet first on the ground. The ball is dead the instant
the runner touches the ground with anything other than his hands or his feet; or
Note: Defenders are required to treat a sliding runner as they would a runner who is down