Employees were demobilizing a microtunneling operation from inside of a 42-foot shaft. They were standing on a 3-foot high pump stand to disconnect the pump when the pump dropped, and the stand gave way. This caused the employees to slide and fall to the ground. The injured employee fell on his left side, landing on an oil can with his co-worker landing on top of him. The injured employee was hospitalized for a rib fracture.