I have three brothers, when we were kids we used to travel to the coast and stay in a caravan. This particular time I was around 8 years old.
Two of my brothers came with me, one younger and one older, we were accompanied by my grandmother (who incidentally was in her 60's at the time)
Anyway, one of the days a fight broke out between us, and I decided to seek my revenge on my two brothers.
I carefully emptied the sugar bowl into the trash and refilled it with table salt, and waited.
The next morning we all got up for breakfast and nan asked us what we wanted. I wanted cooked breakfast, and the others wanted cereal. My plan was working perfectly. She put the cereal in the bowls, filled the bowls up with milk and sprinkled sugar (or so she thought) over the breakfast cereal. It was going to be perfect.
Then things started to go wrong. She then boiled the kettle and started to make a cup of tea............with 2 sugars
Before either of my brothers could eat a spoonful, she drank a great big glug of the tea (salted). Her face screwed up like a buldog chewing a wasp.
Things didn't really go down to well after that.
She is now in her late 80's, and when I see her these days, she can still remember that cup of tea - so can I.