Roof bolter was being backed out of x-cut 2-1 into x-cut 3-2. Injured EE was sitting in #2 entry. As roof bolter was traveling outby, EE saw loop of cable was going to be hit by the machine, so they reached around corner to grab it. As soon as they did, the bolter slid on the muddy, side-pitched bottom and pushed EE into corner of coal rib with canopy.