So I was sort of drunk during UFC 83

[WildCard]

But how was GSP passing Serra's guard I was watching and he was basically just throwing his leg over

i.e. Serra was in open guard and GSP would take his right leg and just clear it over Serra's left leg.

Why have I never been taught this? Effective move? Worth adding to my game?

 

[ShanghaiBJJ]

Because it is easier to counter the move if you are not in danger of getting hit in the face.