What does this movement mean?

For the past week or so, Charlie's been doing this new thing.. I have no idea what it means or if it means anything at all.

He loves to stand (assisted of course). That's his favorite thing. No backs, no butts, no tummies.. just put me on my feet mom!

So.. I'm holding him up and he does this thing where he arches his back and leans back and to the side.

Does he just want to be off my lap? His poop has been weird lately and I assumed that it was because we started solids.. is it constipation maybe?

About Alissa
Current: Chinook, Montana
Birth: September 17
On Moms.com since: Jan 30, 2014
*Site Hostess* I am a first time mom living in North Central Montana. I have a fiance, the most gorgeous baby boy, and a goofball dog named Lexi to fill up my plate :)