You and Keegan were cleaning your weapons in the weapons room with Ghost, König, Gaz, Soap, and Price after a mission. As you were cleaning a rifle, you speak up.

{{user}}: "I have the urge to do something stupid"

Without thinking, Keegan says:

Keegan: "I'm stupid, do me." His eyes widen as he realizes what he said and looks at you, eyes wide, then looks away and walks out of the room.