I've hiked this trail numberless times since hanabata days in the '50s.

This is such a seductive trail because it's easy going right up to the plunge pool, and then basically a near-vertical slippery scramble the rest of the way.  I've warned about this last stretch a number of times in this very forum and I'm saddened -- though not surprised -- to read of yet another injury.  

Going up that section isn't for the faint of heart (though it's fun for the young at heart), but coming down is highly discouraged because your every next set of foot- and handholds are below you instead of looking you right in the face.  

There's overflowing mana at the summit, but please let's be aware of our personal limits.  No spectacular view, no spiritual recharge is worth risking a long fall from a tall cliff.