How to threaten someone and make them believe me
It made me
Happy that it worked 
"I used a serious face and something that sounded terrifying to get my way."
How I did it: I just told my friend that if he told me secret to someone I ould bash his face into a block of cement. I used a really serious face and now he doesn't ever tell any of my secrets that I tell him.
Lessons & tips: Just be really serious and use something thats really threatening to that person.
Resources: Learning to hold back the feeling of wanting to laugh.
