Help! I've fallen, and I can't get up...

We went to go pick her up. She wasn't hurt, just slid into the floor and couldn't get up. She was elderly- probably in her 80's. Her front door was locked, so we went around to all the other doors. The sliding glass door was locked. The back door was dead bolted. The back kitchen door didn't budge. The door to the back bedroom not only had sagging, rotten wooden stairs with the bottom step missing and iron railing rusted and falling off the side of the house, but the door at the top of the stairs was locked as well. We circled back around to the front of the house, my partner advised dispatch that we may have to force entry. While circling the house I took inventory of the hundreds of potted plants she had in her carport, on her sidewalk, and lining her stairs. Wonder which one had a key hidden underneath it? I went back to the front door and peeked in the window to try talking to the lady. She gave me a thumbs up sign and interlocked her fingers behind her head, getting comfy while waiting. At least she had a sense of humor. She then sat up and her face had an "Aha!" expression. She began making hand motions and pointing upward. I didn't understand at first, then looked up. There, are the top of the door frame, was a nail. Hanging on that nail was the key to the front door. Doh!