When Al's luck starts turning good, as well as the rest of the Bundys, (Bud being accepted to a prestigious college, Kelly quitting her waitress job for an acting career, and Peggy wining a lot of money at Bingo) he knows that sooner or later he is doomed thanks to the Bundy curse for everything will turn bad. Written by
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Oh, by the way, Dad, they made me scrub all the toilets with a toothbrush, so I borrowed yours.
[he takes a toothbrush out of his back pocket, hands it to Al and races upstairs
Well, at least the part about the toothbrush was bad luck.
No, Peg, this is good luck. This is yours.
References The Twilight Zone