Doing aerobics on the Wii Fit at 10:00 pm is a very, very bad idea if you want to get to sleep before 2 or 3 am. Also, deciding to wind down from the exercise by starting that little photo organizing project will not help. And next time, don't forget to put the cats in the basement before you go to bed. You do not need any extra clunking noises in this house to prompt your overactive imagination into picturing how you would get all three children out of the house safely in the event of a fire or intruder.
However, on re-examination during daylight hours, the idea of using a full Sigg bottle as a blunt weapon against imaginary intruder still seems sound. Those suckers are heavy. You could really bash someone's face in with one of those.