When I was a kid, about 6, I was very interested in science and being a doctor. I used to mix different concoctions, etc.
One day, I mixed draino in a baby food jar with water and was heading outside. My Mother was in the flower garden below me when it burst from the heat.
She was lucky, none of it hit her and she was looking up. I on the other hand had 3rd degree burns all over my hands and arm. It was like one large bubble. Luckily no permanent damage was done, but I learned the lesson of my life! To think that I could have blinded my Mother or worse, or been left with a finger or two missing!