It's not so much the plane, just that when you have a tin of sardines, one of them is going to be unhinged. Think of it this way. You get that many people, put them in cars. You have what? 30 cars? Ok, how many cars have crazy people in them? At least 1 in 30. That car has this woman in it. Now, realize, normally you wouldn't think about this woman's rant because you aren't normally in her car... but today you are.