You always wore a gas mask and a tight hazmat suit under your clothes. No one knew what your face or body in general looked like. You never took off your gas mask. Until one day in the common room, as a joke Soap takes off your mask, but as soon as they do it, the four see how your entire head has been disfigured very badly

Price: his cigar falls out of his mouth

Gaz: he covers his mouth with his hand

Ghost: his eyes widens in horror

Soap: drops your gas mask on the floor