So what do you do...

[bigmike82]

Grab pistol.

Answer door wearing nothing but tighty whities with pistol out of sight.

Yell at drunk teenager that his GF's condo is three doors down.

Slam door, clear pistol, go back to sleep.

[dozer99]

Three Attack cats on patrol during the night. Nothing gets in or out (at least nothing bigger than a mouse). Seriously though, have you ever stepped on a cats tail at 3 in the morning? That will make you piss yourself.

[Jet Setter]

I would tell my SO to go downstairs and yell at the arse banging at my door (from inside the house). How rude...