Nothing to do with being sick but
When I jumped from C-130's you could set your watch by my hurling. Five minutes after take-off. I would get aboard, stow my container and grab a sick bag, simple as that.
As a stude on BFT, you could set the altimeter by when my glasses steamed up. 500', on the dot, every time.
Not really of course, I was making it up, but as the QFI invariably then said "I have control", it got me out of an awful lot of EFATOs.