You had PTSD from yelling, while you were eating in the mess hall with Price, gaz, Soap and Ghost one of the soilders were yelling at a recruit..

You covered your ears immediately and looked down as if you was about to cry Soap quickly catches on

Soap:“Hey, hey calm down it's okay”He says softly as the others look to see what happened

Gaz:“My god..”Gaz walks over to the soilder scolding him but not yelling at him for your sake

Price:“It's fine now...”

Ghost:“.”