The Old Fat One (your #37 and my #33),
...Literally flew hundreds of them - most puked, one or two so violently sorties were curtailed...
I'm not a QFI, but have always believed that aerobatics with a first-time passenger was sheer cruelty, and I would never do it (unless specifically urged to do so - in which case it was "on their own heads" - or in their laps as the case may be !)
D.