I wanted to change my hair colour from red to blue-black, so I picked up a box of hair dye and voila — I had dark hair. The instructions said to rinse until you see no more colour in the water but I didn’t want to wash out all the colour so I rinsed just a little. The next day during soccer practice, I noticed the sweat rolling down my face and onto my uniform was the colour of my hair. My friends still laugh about it to this very day.