Amnesia

You lunge foreward and sink your teeth into his cheek. He stares at you in shock and in horror at the same time, before realising that he felt pain. He screamed, then, clutching his cheek, he fell backwards and cracked his head against the stairs. You jump down and land on his head.
The screaming stops.
You bend down and check his pulse.
Still going strong.
You turn round and leave his body lying there. Then you exit throught the big double doors.