About four hours into a nine hour ferry flight in a small piston twin, I broke out in a cold sweat and felt the first rumblings from the belly. Knew I was stupid to eat the sea food.
Fortunately I had a large black garbage bag. So for the rest of the journey I sat with one arse cheek on one seat, the other on the other, with the bag between the two. Poor customs guy in BN almost passed out when he stuck his head in, funnily I never noticed the pong.