Cheeky Buggers

It started as a normal day. I walked into the staffroom at morning tea and saw a group of teachers staring out the window. So naturally I followed suit. I couldn't work out what they were looking at as no-one was on the field and I couldn't see any traffic. I was then pointed out that the 30 metre metal fence running the width of the field and school was gone. Low and behold some cheeky bugger had somehow undone and removed the entire fence! Gone! How on earth and why on earth would someone do that? and how did no-one see anything??? GONE!