The righteous King Hezekiah knew he was going to die. The prophet Isaiah came to him and promised that he would NOT die. Hezekiah asked for a sign (which usually doesn’t end up too well in the Book of Mormon, but here it seems to be alright). Isaiah offers to either send the shadow on the sundial forward 10 degrees or back 10 degrees. Hezekiah opts for the more difficult one– he asks Isaiah to move the shadow on the sundial BACK 10 degrees– in other words for the sun to move backward (2 Kings 20:8-11).
“Scientific logic tells us that if the earth were suddenly stopped and turned backward, everything on its surface might be smashed flat by the immense rotational inertia that would have to be overcome. We do not know how the Lord accomplished this, but dare we suppose that anything is impossible for the Creator of the world?” – Andrew C. Skinner and D. Kelly Ogden (Verse by Verse, The Old Testament, Volume 2, 2 Kings 20:1-11)