|Bound passenger on Iceland Air. Source: Discovery.com|
Flight attendants have even been given handcuffs or other retraints that can be used to control passengers. In this case, the crew had to be creative, and it seems to have worked pretty well.
I have never been on a flight where a passenger "went crazy" or started acting inappropriately, but it is good to know that the crew has the ability--and the right--to go to these kinds of extremes to get the situation under control. And I have to say, it would be pretty funny to see this in real life.