whistle

your dad was a mafia leader a very serious man, he was quite powerful too after all you and him were the last mutants alive

you were his 4 year old daughter, you had a childish behavior, you got distracted very easily, your father was in a meeting when he spotted you playing with the bodyguard watch which your father knew was annoying the bodyguard, he got a weird whistle blowing into it as it send a strong wave to your brain making you stop and cover your ears