Weighted stuff

ok i was watching bernard hopkin's Training Video And He Puts this "helmet " looking thing on with a big weight attached to it and moves his hes up and down whats this for??

Also If I wear a Weighted Vest About 60 lbs or something during Workouts Would it increase my stamina alot

~ http://youtube.com/watch?v=GjV3O2CLisg ~The Weight thing im talking about is at Around 2:50 minutes~
-Thanks everyone-.

It's a neck harness, it's used to strengthen the neck muscles which helps when taking punches.

I haven't heard of many people wearing weighted vests while training. It'll certainly make you work harder so should help with your stamina, depends what you're aiming for. I heard Ali used to wear weights low next to his feet sometimes to get extra spring, but it wasn't anywhere near 60lbs though.