Tales Out of School.
Upon my return to Petawawa from vacation in August of 1957, I was approached by a certain pilot who said to me "I've learned a couple of new tricks while you've been away". The first was the phantom aircraft trick where the pilot would climb into the back seat of an L-19 and the second was an impressive loop-the-loop with the aircraft. (See videos below.)
Phantom aircraft trick with L-19 705, Petewawa, August, 1957.
L-19 705 performing a loop, Petewawa, August, 1957.