I remember dropping the Ensign at ISK during a blizzard, I pulled the rope and it was stuck, pulled a bit harder, then a lot harder and the rope gave, along with a lump of ice the size of a football, which was heading straight for my location, i neatly stepped to one side and it smashed into the ground next to me. I thought "that was close" and carried on. As i about turned, the Orderly Officer was grinning from ear to ear. The Staish was right behind him also grinning from ear to ear, they were both pilot's I knew well from their visits to the simulator where the simulated ATC service we provided, often added to the problems they already had. I remain unconvinced to this day that one or both of them had not spotted the ice, despite their pleas to the contrary. Happy days.