A damn digital camera...
Note to self: prop an M1A next to the computer desk.
Sitting in my study reading this - in the corner to the left of me is a Mosin Nagant 91/30.You can call and tell me you are on your way. I'll keep a watch out for you from the roof top.
Watch for the signal fire. I'll be the guy frantically trying to reload a tube magazine fed .22 rifle while running.