MRDs
I also remember seeing the slabs of smooth ice it created once it had moved away and the water re-froze...
...Most of the 12 Sqn aircrew watching from the crewroom as the mighty beast struggled to clear the massive pan at Honington - followed by OC Eng on foot keeping an eye on the action - how we howled when he went a**e over t*t on the Olympic-quality ice rink the machine left behind...