Test yourself to see if you can spot it without looking through the comments.
http://www.youtube.com/watch?v=8c-Ovae_63s&feature=youtube_gdata_player
http://www.youtube.com/watch?v=8c-Ovae_63s&feature=youtube_gdata_player
It's also the wrong shot - the one-rail kick was available from either position.The CB was in a different spot when Efren shoots...
It's not a zig-zag shot.
Mosconi did it earlier, allegedly to win a championship. There is a clip in which Mosconi (and Ponzi?) reenact the shot.
As a trick shot, the standard position is from the corner hook, and the problem is usually that the cue ball comes in short. In the clip, the cue ball was moved to a shorter position so the table must have been playing fairly long.