 What's that? If it gets cold. If the AC gets really cold and feels really good, in most cases, your AC is in pretty good condition. Yes. It's working. If you got air that's not quite as cold as it used to be, that could lead into some damage on the system because the refrigerant is what carries the refrigerant oil. And if you're low in refrigerant, you're low in oil. That means your compressor is not getting lubrication. Boom. That causes...