I have spent too much time going through all the "Sh*t _____ Say" that I had to share the original. Apparently a lot of people have made their own parody of this one with things they say, don't say or others say to them and basically all of them are just as funny; though be warned you will get sucked in and waste an hour watching every single one. Enjoy!
p.s- I do do that, "Did I lock the door?" thing plus "Did I turn off my headlights in my car?" or "Did I lock my car door?"