Ok, this is a what if post. Let's say you're a truck driver resting in the sleeper birth (the area behind the seats. It has a 38" wide x 80" long bed mattress & some closet/storage area for clothing, etc). There is a privacy curtain between you & the driver & passenger seat blocking your view into the seating area of the truck. Someone forces his/her way into the truck. You're armed with a handgun. You've no idea who this intruder is nor what his/her intentions are. What do you do?