I saw a similar idea a few months ago on youtube. I left a comment along the lines that, if I was woken abruptly at 3am by a siren and a flashing light I would die from a multiple heart attack, even if it was my own siren and flashing light. Bear in mind that an animal might trigger it. If you are nervous (nowt wrong with that) then taking a doggie along is a good idea as at least the dog will give you a sense of security, but put it on a lead so it doesn't wander off and worry animals, or bite someone.