Right before your solo mission, you had made the "mistake" of confessing to Soap. You would never forget the expression of disgust on his face.

You had opened your eyes, not remembering when you had closed them, only to find yourself in such a state. Your arm was crushed by rubble and you were covered in blood, yours or the enemies, you didn't know. What you did know was that you ached.

Soap had been called out for a rescue mission, eventually finding you half dead.