I wouldn't worry about the balloon, back in the day it was a good execise to blow up balloons in the cockpit ( one at a time or have two blown up ones and stow them behind the seat) then open the door and let them out. The name of the game was to do a 180 degree turn and chase the baloon then pop the baloon with the airframe or prop.
Good fun, of course this was done in the nineties when flying ultralights was more fun and we didn't have the do gooder, you can't do this or you can't do that crap we have now.