I am brand new and haven't even taken a class yet but am interested. I saw a move done and was wondering in which discipline is this taught. The person, while standing in front of the other wraps their hands around the person's neck interlocking their fingers and at the same time jumps up placing both of their feet on a position just above the others knees. Then, they pull towards them pulling the other person done head first towards the floor. It seems to be one where leverage is used and the element of surprise since they have to get very close to pull it off. Is this considered a defensive move or offensive?