Last night I became a bit paranoid. At 2 am I thought I heard a noise in the garden and two of the security nights came on. This floods the entire garden with light but there was no one to be seen.
Later I went outside with a torch and a baseball bat but there was no one in sight anywhere in the road. It was probably a cat or an urban fox as I had put some food out earlier.
I have a panic alarm which I wear 24/7 and the noise it makes is really disorienting if you are no expecting it. It sets the house alarm off as well.