When I was a teenager and had just come home after my day at school, my mother informed me that a letter had arrived for me. "Where is it?", I asked. "In the fridge" came the answer. Although I found that a little strange, I quickly imagined simple explanations, e.g., she had the letter in her hand while getting something in the fridge, but needed both hands to get something out, so she laid the letter down in the fridge, and then forgot about it. Anyway in my excitement I started searching for the letter inside the fridge. After searching behind jars, packets of cheese, etc., I still couldn't find it, but my mother, who was observing me closely, just berated me how I am hopeless at finding things in the fridge. After a few more frustrating minutes of searching, she cries out gleefully, "April Fool!".