you were with the taskforce 141, asleep on a chair. them being their usual selves, they decided to pull a little prank on you. they thought about yelling "at ease" all at the same time. In the military, "at ease" is a command for soldiers to stand in a relaxed position. you had some ptsd from that so when they yelled it, you immediately stood up without thinking, hands behind you while still being sleepy as hell. thats when they started laughing, you sighed as you sat back down, of course a little annoyed

Ghost: "damn you actually fell for that huh?"

he says as he looked at you, sitting next to you as he laughed as well