I respectfully disagree, and vigorously.  It's one thing if I  want to go
jump off a cliff and kill myself, and quite another drag an entire  community
with me.  I've been at several rides where a seriously dangerous  horse (just
another term for "green", Howard) caused severe injuries to other  horses
and riders or to just their own rider.
   
  
Howard, you can get your adrenaline rush in multiple ways using  multiple
activities and/or multiple chemical compounds.  Endurance has  NOTHING to
do with your green horse mania and everything to do with the  creatures under
our care and control.  A green can EASILY injure  themselves, can EASILY
injure other horses and riders.  You want a  rush?  There's several people
on this list that train RACEHORSES.  Get  on one of them.
   
  
The adrenaline I feel when I'm riding a green horse does not even  remotely
equate to the glow I feel when I successfully cross the finish  line at the
end of an endurance ride.  What I do love is the feel of green  horse gaining
wisdom and experience...as they begin to navigate the difficult  aspects
of the human/horse interface, overcoming complex  environmental/visual obstacles,
learning to be cool.
   
  
To paint all of endurance with your color choice is rather  myopic.
   
  
Mike Sofen