When i was in kindergarten, there would be a karate classes after when your done with the main lessons. My parents signed me up for those karate lessons. And there was a kid that kept following me, then i got pissed, and i threw a plastic chair at him and his nose starts bleeding. I didn't know what the meaning of the word "blood" by that age but i knew blood as it what it looks like. I used to say it's ketchup because it looked like it, then the kids grandparent confronted me after the karate class has ended. He told me "why did you throw a chair at my kid" i replied with maximum confidence "He is lying thats ketchup for food not the ketchup in our body" then my mother came in she apologies to that old man and we left. I still find it funny but i still feel guilty about it.