I'd arrive early to school, it was 7:30 am. There was barely teachers there, so i went to my first classroom, the teacher wasn't there but i saw a coffee cup on the table. That's when i had a great idea, perhaps lets call it a prank. A really good one. I grabbed the coffee, took it into the bathroom with me, pour all the coffee out and i had another drink on my backpack, an energy drink. So i poured the energy drink until the middle of the coffer cup then i fill it up some *pee*, well yeah its disgusting but i was young and crazy!. I took the coffee back into the teacher's desk. It was 8:30 am and everybody had arrived, we were ready for class. I was sitting at the back sit, with a troll face waiting for the teacher to drink the coffee, man i had made up a really good prank!, so the teacher was explaining and it was then when he grabbed the coffee, took it into his mouth and all i saw was him throwing that coffee away with that disgusting face. Everyone was laughing but not that many. After my last class he came up to me and said " It was you, right? " I said " Me? ", yeah you he said. He stared laughing and said " I know how it feels, young and crazy ". He went away.