A sub contractor’s telehandler tipped over while reversing on an elevated and inclined plane. After off loading one foundation, the banksman gave signal to reverse the equipment and park near an inclined and elevated area. While the banksman was busy on other activities, telehandler operator decided to straighten the wheels by moving the equipment in reverse. When he moved the equipment on an inclined plane with raised boom, the center of gravity of the equipment moved and the equipment tipped over to left side resulting crush injury to operator’s left little finger.