First, the bad: Crying baby at 3am last night. Nooo!
The good (for me): M responded to my 3am elbowing and got up with him. She successfully settled him back down with none of the multi-hour antics he and I went through the night before.
I have a theory. Now that he pulls himself up to standing at every opportunity, I think he's doing this every time he floats toward consciousness, whether he's ready to wake up or not. In the past, he'd probably lay there for a minute and drift back off to sleep, but not anymore.
He has NEVER alerted us that he was awake by crying before. He always seemed to wake up slowly and we'd hear him in his room, babbling contentedly, then go in to find him smiling and happy. Lately, all naps and nighttime sleeps have ended with us hearing loud, unhappy cries and going into find a groggy, grumpy baby standing in his crib. His eyes are barely open half the time. It's like he doesn't really want to be awake yet but his body got him up anyway. When this happens in the middle of the night, he's especially pissed to be awake. Can't say I don't share your frustration, kiddo!
So, will the novelty of pulling up wear off? How do we convince him not to do this in the middle of the night? What a strange (and inconvenient) side-effect of his new-found skill!