EE WAS PUTTING A DISCHARGE HOSE ON A WATER PUMP.THE HOSE WAS HELD UP BY A LOADER BUCKET. EE WAS TRYING TO PUSH THE END OF THE HOSE INTO PLACE TOBOLT TO THE WATER PUMP. THE HOSE SLIPPED OFF THE LOADER BUCKET AND CO-WORKER CAUGHT IT & HELD IT UP CAUSING THE HOSE TO PUSH AGAINST THE BACK OF EMPLOYEE'S NECK.