Last nite, went to bed as usual at 11.30pm. Slept alone as wifey is on biz trip. Suddenly woke up at 1.30am with my heart pounding away for no reason, didn't have any nightmare as far as I can recall. Tried going back to sleep but had this uneasy feeling that there is something in the room. Thinking that it is just my imagination, I shrugged it off and closed my eyes to try to sleep.