Watch your back, or your head

So Eli's threat for me to watch my back was real. I went to lay down in bed last night and removed the pillow that was propped up against the wall for reading. Underneath, perched nicely on my white pillow case were my dirty old running shoes. This morning I mentioned to Eli that I had found running shoes on my pillow and I wondered how they got there. With a twinkle he said, "I told you to watch your back." He'll get his. I'm off to plant something under his pillow right now.