You skip the flat ones.
100 bill.
Women.
Why are you skipping numbers girl 1: Because I can't even!!!
Hey Microsoft, why is there no Windows 9? You've given us 7 and 8, and now you're skipping straight to 10?" "Well, to be completely honest, 7 8 9."
Her Highness will tell you
Because heavy metal is harder than rock.
You can skip the flat ones.