Drunken photo...Why?

Looking through my phone today I came across this very random photo. From the looks of the date and time it was taken on my way home after some heavy drinking this weekend.

A couple things spring to mind:-
1) Why would I take a picture of a street sign? Possibly because it was very dirty!!!
2) If I was so smashed I can't remember taking it, how did I manage to operate the phone camera at all?

Bring out the men in white coats!!!