First time I started playing Farcry 2, I would always shoot out my head/tail lights on vehicles so it would take longer for enemy vehicles to detect me (people driving standard cars will crash into you before noticing you sometimes). Anyways, I didn't finish that playthrough but started up again last week. My brother comes in (who has 100%'d the single player) and says "You remember to turn off your lights, right?"
Fucking. Shocked.
But I saved face by picking (at random) the correct button to turn off my lights. It's RB when you're in the vehicle, btw.