Attempted break-in last night

Mandeville, pretty nice neighborhood. Crashed on the couch in the living room (because had a stogie late night and didn't want to stink up the bedroom).

About 4:30 am, back door opened, slowly, but door fits tight enough and with enough vacuum that it made a distinct sound that woke me up, even from a deep sleep. Groggy, but looked up and saw a silhouette through the door window and part of the opening (door open about 4 inches). Wasn't a head and shoulders, but after recreating it (about 20 times) someone trying to quietly open the door wouldn't have presented such an image, but more of a slimmer side view that I saw. Went from zero to max almost instantly, I think I yelled "What the frick?!?" and flew off the couch at the door.

Ran out, swept right, then left, then back inside. Wife met me in the living room saying she heard a loud thud (still not sure what that was), told her someone was trying to get in the house, made sure everything was secure inside, then armed myself and went out again. Swept the perimeter, all clear.

At this point, I'm honestly wondering if I imagined it somehow, being in deep sleep, maybe vacuum from AC made door open or something else, then checked cars and found that my keys were missing(1) and center console of wife's car was up, but nothing else missing. So, the combination of the two events (back door and cars) made it pretty clear that it was real.

Ok. Catastrophic security failures on my end, unfortunate consequence of living in a normally pretty safe area. As noted above (1), I got in the bad habit of leaving my keys in my car and car unlocked. Outside flood lights not turned on. Rear door not locked. Back yard open on the sides of house (but otherwise enclosed by side and back neighbors' fence). Stayed up till dawn walking the perimeter and spotlighting around here and there (but trying not to freak out neighbors).

Changed out house locks. Put up fence on one side (other side is much wide and will require more time to fence off). Flood lights adjusted better and will be turned on. Even got a door bar for rear door.

If you've read this far, bravo, you're a true OB warrior. What a fricking freaky thing. Clear stupidity on my part, but I never thought it would happen. That won't fricking happen again. Had to really think through a lot of shite.