Ones upon a time, in my math exem I could't solve a really hard task.
Luckelly I had a smart watch and before the exem I took some photo about the math formulas, what I should learn. I turned on my watch and I started to see what formula I needed, suddely my benchmate stand up, and unfortunatally the teacher cought me, the worst of all was that she said that I have to leave the exem, before I can finish it.