What is normal and what is not?

After few seconds of dancing and singing my colleague stopped and said: "Don´t worry, I don´t use to be so crazy,... I am really normal." It was so nice, natural and optimistic. She left to her office and I asked myself: "What is normal and what is not?" Is it normal to behave like still water in the plastic bottle? Only move where the bottle is moving?  

Our minds are wider than minds of our grandfathers. Is it because of media and uncensored information about people from all over the world? What is normal for us and what was normal for them?

We are open to talk about our lives, to chat with strange people, to share our opinions, ideas, our pictures and emotions. We want to be faster, stronger, more clever than everybody around. And to show it, that we are like that. We can "touch" everybody, include someone from the opposite side of Earth, so everyone can know each other. 

What is the trick? To be lightly sparkling, don´t move like still water in the bottle is moving, but don´t move so much, that the lid will explode.