flop

I was reading the men's code of points and it had a section on flop sequences on pommel horse which I didn't entirely understand. Can anybody explain to me what a flop series is?

I have a few gymnasts currently training LLR180 to the end on pommels, here is the question: Considering the fact that stepping up (1/3 Magyar) to the first pommel is a skill in the FIG book, then are judges interpreting the first step up loop as a seperate skill THEN the gymnast must perform...