I left the car outside for 2 weeks while I was away in North CA. The rat had chewed through a lot of rubber in my engine compartment... it stopped being funny when I saw the repair bill.
The air filter was, ironically, just fine and didn't need to be replaced.
I told the guys at Big O that I was unemployed and they cut me a small discount. Then another customer suggested that I should submit my resume to Blizzard.