Close to the end when John Wayne and the bad bald dude are fighting in the church, one of them has the spear and he is swinging it around and he hits the window sill with the spear head well you can see its rubber there cause it bends you have to be looking at it to see it.
The Chinese used spring steel in most of their weapons to decrease breakage and when attacking an opponent. Also, if you miss, you still have a chance of inflicting bodily harm to your enemy with the sway of the blade.
Yeah, good point, but I noticed it too. When the BLADE hits the window sill, it bends...doubles over...so it's not on a spring...it just looks rubber is all...it's a slip-up!!!