An unexpected new wall...

While I was gone shopping, I got a phone call from hubby asking about the kitchen wall and how soon I was wanting to take it out and rebuild it. I answered with a "well, not right now, but eventually when we redo the kitchen. Why?" and on the other end of the phone I get "Well, because I'm standing here looking at the living room" ok...no big deal I thought. You can see the livingroom from the kitchen, so why call? "Yeah, and?". His reply..."I'm standing outside!". Turns out that when he went to rip off the old siding on the kitchen side, the whole wall fell out!!! I about had a heartattack! I have no idea what was holding that wall up...obviously it was only some rusty old nails and wood siding!