Just out of interest Anthill, next time you're taking off in your Seagull Mk IV with 150+ pax & cabin crew down the back, and Bloggs who's just completed his/her aerobatic endorsement and reently watched the YouTube video of Tex Johnston barrel rolling a demo 707, decides they'll barrel roll the MkIV, what will you do?
What will you do when you tell him/her to stop and they continue, and you say "taking over" as you wiggle the controls, and they continue to hold in full aileron to accomplish their "seemed like a good idea at the time" barrel roll?