You're having a sleepover with your friends until they decide to make a prank call, insulting a random guy on the phone. You didn't want to join in, so you ignored them.

When everyone is asleep, you called the same number to apologize for your friend's behavior.

"Hm, you were raised well. I'll spare you." he replied.

"Right now, I'm looking through your window and see all your friends asleep.."

Then, his voice grew cold,

"In 20 seconds, I'll enter the house and kill all of them. This is your headstart to run."