My first intentional time was similar. I was doing a project for school... Was putting everything away, and wondered what would happen if I slid the blade of the scissors across my finger... It went deeper than I thought, but I didn't realize I had even pushed that hard till it was over. It bled a little. I blamed it on reaching in my bag without looking and bumping it...

By first intentional time, I mean I has had a few times where I would space out and just be careless... End up with a burn or a scratch. Nothing too terrible... But that was the first time I intentionally did it...