Jesus didn't slide. All he did was make the folks decide which one didn't sin to prepare properly who got that stone to throw. (There was preparation needed before stone throwing, but in their haste to find someone who sinned in a way they did not, they forgot that part.) And healing on the Sabbath isn't breaking The Law. It was breaking the new-and-improved-jewish-construct posing as the Law.
If Jesus slid, he sinned. If he sinned, that cross was wasted pain and energy.
He "slid" all the time, according to the historically accepted and honored (almost, worshiped) traditions that they followed... just as many of us follow the time-honored traditions we grew up believing were "church."