When my little sister was born I was so fed up with having to babysit her I put her in the fridge for 5 minutes

This was years and years ago, and up until recently when she was tall enought to reach the fridge I would always keep it locked, and when she was little I would keep it even more secure. Sometimes she would get fed up with it, and would go to tell my mother. I would pull her back, and whisper to her, "remember the fridge," and she would shut up.