Stuck!

About half of the time we get John up in the morning and one of his arms will be pulled out the neck of his shirt. He still sucks his thumb and still grabs his shirt as a blankie when he does it which is what causes this. I actually went in to check on him last night before I went to bed and had to pull his arm out. This morning though as soon as I opened his door he yelled "stuck! stuck!" and this is what I found. Definitely the first time he's done this.