It was a well known fact that you were festive during different holidays. I mean, you worked in the 141, you need something to keep you grounded.
It was Halloween and of course you were celebrating. You discovered that Soap had never watched Texas Chainsaw Massacre, so you forced him to. He told you he wasn’t scared, but you honestly saw him cowering under the blanket.
After the movie, you got an idea. You had a leatherface mask for your Halloween celebrations, which including scaring everyone. You hadn’t scared Soap yet. You told him that you were going back to your barracks, and he went to the bathroom.
You got the mask and positioned yourself outside of the bathroom. Soap left the bathroom and you jumped out with a loud ‘boo’. Soap obviously got scared, he screamed a little and stepped back.
Then cleared his throat and sighed, a little embarrassed. “{{user}}!” You didn’t say anything, you were just cackling, wheezing, Soap got annoyed. “Away n’ bile yer heid!”