Your answer to that Roby is this the books that girl was going through all sorts of thoughts in her head... does she jump.. does she push him.. does she jump & grab him etc. Ultimately by the time she figures out what she is going to do in the book the hound cuts her plan short
Things are funny when you read a book you get to imagine whats going on in your head.. again the book of game of thrones was like 600-700 pages & they really slammed through it in just 10 episodes (most seasons for shows are like what 13?)
One of the coolest things in the books is that each 'chapter' is done under the point of view of one of the main chars.. often times you get to see an 'event' through the eyes of multiple people aswell..
Anyways, going back to that scene.. in the book you would read the whole internal arguement in this poor girls head but that moment is over in just a few seconds as we see in the show
