On June 28, 2008 Truck #390 was leaving the #518 shovel from a drop cut when a void opened up underneath the left rear tires causing the front of the truck to rise up in the air. We called the 1800-746-1553 @ 9:30 am to inform MSHA that the employee was okay and that we were taking special precautions to secure the truck before removing the employee by using a man-lift.