We used to be cool. And then we became parents.
It’s like a rite of passage that no matter how urban/hippy/chic/bohemian/coolio/awesome you were, one day your kid will look at you and wonder what planet you are from. I remember when showing a thumbs up meant you were uber with it; it was a statement of being in. Later on of course a difference finger replaced the thumb and then the high five and the rock on happened somewhere in the middle and then I think I just lost track.
Nadi however seems very with it and he has his very own cool finger thing he does- and is now in the process of teaching us.