I brought leftovers on a plane recently and unthinkingly opened them to eat about halfway through the flight...the smell of kimchi was quite strong. My SO and I looked at each other and were like "oh crap, we're those jerks!". The smell had blended in at the Korean restaurant where we had eaten earlier, but not so much on the plane. We ate up as quickly as possible and tied the trash in a plastic bag.

Sorry, people near us on that flight! Will think it through better next time.