We are having dinner. Sempi is eating enthusiastically and suddenly cried out, "AAARGH!".
Me: What happened?
Sempi: I accidentally bit my tongue while chewing.
Me: I'm sorry Sempi, that must be quite painful.
Vian who is listening to all this plays around with the food in his mouth and suddenly declares:
Vian: You can actually bite your tongue anytime you want, not just on accident.
Me: That's.... that's not a feature Vian, it's a bug.