Question: how did you set a room in your school on fire?

Christian Gude answered on 13 Jun 2019:

I made an experiment for flame colouring. When you add certain elements to a flame, some change the colour of it. I used a self-igniting powder for it that was meant to catch fire only when in contact with water. Unfortunately, friction did the same. It was an accident and made me respect chemicals a lot more than I did before. Safety first!