My son (16 months) holds the back of his head when he's having a bottle. He walks around the house with his head tilted back, bottle in the mouth, and holding his head up Makes it look like he's posing!
Also, he's very into things that are "amazing". His nana's mini TV that has a little Christmas scene and plays carols is a big hit, also, when the fan is on and blowing on his face. He doesn't make a sound, he just opens his mouth really wide like something amazing has happened. He even has his hands opened up wide. It's a real "OMG that's amazing!" look Very cute especially as he knows the adults have a good laugh out of it, so he really lays it on thick sometimes
I can't wait til his 21st birthday, soooo many stories