Help me to figure it out please !!!??

How can a gladiator use shield defense + slaughter "bug" , please if any 1 know it tell me or pm in the forum.

here is a video that guy's using it :


Please as soon as possible ..

Thanks .

Lol any reply please ..

Sorry... but that must be a very new found bug/exploit.
use the search engine to find out more, or google round a couple of mins ^^

Thank u for replaying , I hope any one could help me out , I'v searched about it in Google many times but seems no luck for me .