A mate doing an air experience flight in a bulldog with ATC cadets asked the female passenger if she would like to see what if was like to do some aerobatics finishing with a barrel roll.
The somewhat nieve lady agreed, unfortunately just as he was half way through the barrel roll, she was rather ill and unable to reach the appropriate bag in time, consequently, when the roll was complete and the aeroplane the right way up, it all became very apparent - everywhere