John - One day a visiting Harvard landed and taxied over to the Tower. The pilot RT'd for a bod to go down to his aircraft while he went upstairs to conduct some business or other with F/Lt Cooper. I was the selected bod. When I got down there, he told me he wanted me to sit in the aircraft and hold the stick back to stop it taxi-ing away as he didn't want to switch off the engine. My moment of glory. I was petrified - no stick had ever been held back harder.