1) He calls it "City Dog"
2) First time he went, he pointed to everyone and said "hat!" "hat!" "hat!"
3) During the preamble to Kol Nidre he announced to the few hundred people silently praying that he had gone "peepee on the potty!"
4) When he was brought to the back room with his dad, he proceeded to break dance for all the children assembled.
5) On the fast day, I brought him outside of the sanctuary for a snack. When we got back, he announced: "More Cookie!".
6) On the way out, everyone was getting up for Amidah. "Up! Up! Up!" he commanded everyone, raising his arms in the air.