Today a friend of mine David Eckholm who was with me in ground school was performing a normal practice autorotation*, to a hover. But as they tried to bring the engine back up from idle rpm to hover power the engine had quit, so they had to do the full autorotation to the ground. They were not expecting this so made quite a hard(but safe) landing with the helicopter tipping forward due to some forward airspeed.
Luckily they were ok and were able to check over the helicopter and make a safe return flight
* Autorotations are used to perform power off landings from altitude in the event of an engine failure.
But when practicing they are brought back to a hover without actually hitting the ground.