I used to get seasick after an hour of slatting about in nil wind...in a sailboat.
On my first flight in a glider, didn't go off colour until an hour after the flight....so after that took quells before flying for my next ten flights...
once I was doing all the handling and decision making, no more problems neither immediate or delayed...until I was invited to fly a competition task in the back seat of a Marianne with a well known world champion....
and didn't have quells on hand. After more than an hour, over Bicester, chucked my cookies neatly into a BA barf bag (note the quality of the container!) Brian enquired, having noticed that I was unnaturally quiet, if I was feeling alright. I am now, I replied. What should I do with the bag?
O, said Brian, just drop it out the DV panel...so I did.
As we climbed tightly I began once again to take an interest in the surroundings, and commented to Brian that we were sharing the thermal with a big white bird. Bird hell, said Brian, that's your sick bag!
It had been in collision with the leading edge of the wing, unloading the contents, and so was able to climb even better than the glider...
Of course I got to wash the Marianne at the end of the day; barf, bugs, soot from stubble fires, flakes of ash from the Didcot power station chimney, etc etc. Those were the days....