Tinkerisk:
MadEngineer: Damn onions.
If you mean their processing, I have a tip for you to breathe only through your mouth instead of your nose when cutting the onions. This reduces the effect. If you mean by-products after consumption, I have no special advice for you. 😆
I think it was neither of those; I interpreted it as the "ninjas are cutting onions somewhere out of sight" meme where you read something and start to cry.