It happens right near the beginning of the vid...
[ame=http://www.youtube.com/watch?v=MGsdIrlrSi8&feature=em-hot]Great White Shark gets head into Shark Diving Cage!!! 03/21/2013 Gansbaai, SA - YouTube[/ame]
[ame=http://www.youtube.com/watch?v=MGsdIrlrSi8&feature=em-hot]Great White Shark gets head into Shark Diving Cage!!! 03/21/2013 Gansbaai, SA - YouTube[/ame]