This nifty Shooting Cubicle Alarm System from ThinkGeek offers you three tiered defense. Video after the break. Here’s how it works:

Each unit has an ever-watchful motion sensor. The first line of defense is lovingly referred to as Alarm 1. When Alarm 1 is tripped two very important things happen. First, it flashes and klaxons to signal an intrusion. But (and this is the kicker) it also arms Alarms 2 and 3 using invisible wireless signals. Alarm 2 also has an audible alarm, but it is louder than Alarm 1. It also will spot the varmint with a red light beam. Alarm 3 is the coolest; when it is tripped two safe (but surprising) missiles will be launched at the now-fleeing interloper

[via Gizmodo]