They're refrigerants.
ACDC
It's USAF.
So for reference, I got into the one dorm in my university that somehow doesn't have air conditioning. My dad was talking about the logistics of bringing one or even two fans + an AC unit to keep my room fine. He then says... well at that point you'll have enough fans to start a fan club.
Recently, my mother started smelling a coolant leak from our refridgerator. She called the repair man and he started work. Several hours later, he had his diagnosis, and it wasn't good. The whole machine was going to need to be replaced. Just as he was finishing up, my dad walked in. My dad asked the repair man what the damages were, and he explained that the coolant intake had sprung a leak. The whole unit was sealed, and air was now getting in and contaminating the entire system. The repair costs of the fridge would be about the same as getting a new one. My dad just sighed and looked at his hands.
Dad: "It sucks." He looked at the repair man with a goofy grin on his face. The repair man thought for a moment before answering.
Repair man: "Yeah... it does suck." Then both men cracked up laughing.
