Under the closet door?

I was in the office a few minutes ago looking for something on craigslist. Lexi was going back and forth between the office and the family room. She came back to the office to see me and she didn't have her socks on. I asked her where her socks were and if we should put them back on to keep her feet warm. She proceeded to get flat on her tummy in front of the closed closet door. She reached her little arm as far under the closet door as she could (it seemed) and pulled out one of her socks. Such a little smartie! She let me put them back on, but I'm not sure how long that will last. She is quite happy with her skill of being able to remove her own socks whenever she can - in her highchair, on the changing table, any other time. She has also begun to point to the foot that doesn't have a sock on it or lifting it in the air to "help" when we are getting her socks on.