Oh, and start shopping for a good extinguisher just in case.
Don't get the standard powdered type, the powder is HIGHLY corrosive to aluminum... especially when you try and rinse it off afterwards.
Although if there's one thing Murphy taught me it's that your extinguisher never seems to be big enough...
If 1 is good, 2 are better, although a in-car suppression system AND a supplemental hand extinguisher is best. No sense in filling your interior with junk unless you absolutely have to!