You've all probably practiced clearing our house before, maybe even during the night. And many of you have woken to a frantic "I think I heard a noise!" from your significant other, or heard a mysterious sound yourself. And even worse, a few of you have had to deal with a real home invader. Do you think practicing being woken suddenly at 3 AM and having to clear the house would be a good idea? One possible way of doing this: buy one of those old-style, wind-up alarm clocks with the external hammer and bells. Take the bells off, and tape an x-acto or other small knife blade to the hammer. Tie a string around an old burned-out light bulb and suspend it from the ceiling, above a (preferrably metal) bucket, on a ground floor room which is accessable to a burglar. Set the alarm for the middle of the night, and position the clock so that when it goes off, it'll cut the string and drop the light bulb. Then you get to wake up to breaking glass in the middle of the night. Maybe even use a dull knife and tough string and set it every evening, so you're never sure how long it'll be before it drops the bulb.