Falling down on the follow-through
You know that advertising insert in today's paper featuring the big image of a spider?
Well, if you put it into the kitchen trash to spare an arachnophobe housemate but left it face up, your good inentions were fine. But it's possible you came up just a bit short on the execution of your "hide this" plan because it might have looked as if there was a big spider in the trash.
