Did I build enough suspense with my posting about The Wall? Seems like it was only a few hours ago!
Said wall is in our office and behind the wall is the staircase. Untapped space lurked under the stairs and I wanted to take a tiny peak to see if it would be usable for storage or possibly for a secret room (and if you're creating a secret room, by all means post it on the internet).
The hole has now been expanded to something more door shaped.