To add one I was told.
Airfield ATC Simulator excercise with a painted scene of said airfield on one wall. Student has everything under control. WAAF acting as assistant alogside. Testers decide to increase pressure on student by adding more and more urgent and increasingly serious situations interspersed with phone calls to the assistant stating Farmer Giles who owns a field outside perimeter fence needs a word. Student getting more and more harassed keeps telling the WAAF he cant take the phone as he too busy. Testers keep increasing the pressure and make one more call to WAAF - she passes message on that Farmer Giles says he must talk to SATCO as some of his sheep have got through the peri fence and are on a runway. Student now at breaking point stands up glares a painted scene and yells 'I CANT SEE ANY F****ING SHEEP. WAAF disolves in tears and testers rolling about on floor in helpless laughter