Signing and Language Explosion

I took two days of vacation, which gave me a four day weekend. I got to spend nearly every second of it with my little Sasha.
At first I noticed that she was very sleepy. She slept a lot more than usual. When this happens, it usually means one of two things. Either a growth spurt (which is usually accompanied by a huge baby appetite), or she is about to suddenly have some new major ability. She wasn't especially hungry so I figured she was going to learn something neat.
And she did! Suddenly one day, she was a signing baby. All those signs I've spent her whole life teaching her, she just suddenly started using. All in the same day! It was amazing. I spent the whole day nearly drop-jawed. My baby was talking to me. She's done a few of the signs before. But usually only for a day or so and not necessarily in the right context, and then she stopped. This seems different.
In her sleep, she would start to stir and whine, and signed "eat" without even opening her eyes. I'd feed her and she'd happily doze back off to sleep. She signed "more" when she wanted more of anything. She signed "eat" when she was hungry, and I didn't even know she was hungry yet because she hadn't even started fussing or whining yet. She signed "dog" when she saw a dog in the lobby of our building. She signed "light" when she was staring at our lights (LOVES lights, it's her obsession). She also said "ite" when she was pointing at the light and signing 'light'. She verbally says "muh muh muh" when she signs more, sort of like the word more without the r sound in it. She says "Duh" for dog. She squeals "DADA!!!" really loud when she wants my husband's attention. Her other obsession is our blue indiglo alarm clock...she smiles and gets excited whenever she sees it. Now she says "ock! ock! ock!" when she sees the clock and points at it. I wish I knew the sign for clock so I could teach it to her.

Cassie was at my parent's house for Labor Day and Sasha missed her. How I know? Well Sasha pointed at the computer chair where Cassie is normally sitting, yelled "EH!" (her name for her sister) and signed "sister" which is what we taught her to sign for Cassie. She kept pointing staring at Cassie's chair looking for her.
Sasha has a little dog stuffed animal, and when I play with her sometimes I pretend it's a real dog. I make it bark at her and lick her and jump around. Now she likes to grab the dog and bark and make it jump around too. It's very cute.

Basically, it just seems like something clicked in her mind and the language light switch just turned on. Watching a child grow from a helpless little infant into a real person is just incredible and it was weekends like this that amaze me.