When you scream "RELOADING!!" in any fps.
In Balloon race V1 in TF2 I always yell reloading so people can get to the wheel so I can restock on ammo and health. It is not something you do without warning your team.
When you post this sort of topic on a completely unrelated forum
when u see a crack whore and whisper " i see a witch" in the console
When you start crying like Louis.