This is the right tool for the job. It is used to send the horse
out 
     away from you and forward also. Don't use a riding whip or a
driving 
     whip, use a longe whip. You don't have to crack and wave it wildly
but 
     you will have it in your hand to flick toward the horse's shoulder,
     barrel or hocks depending on the need. In my opinion it's like
wearing 
     a helmet and proper footwear when riding. You may not need it all
the 
     time but when you do it's reeaalll nice to have. Also, I believe in
     teaching the horse to stop facing forward (traditional and
classical 
     practice) not allowing them to turn and face you. If they learn to
do 
     up and down transitions and halts always facing forward on their 
     circle then they don't have to be turned back around to go on
again. 
     Using walk-halt-walk-halt-trot exercises will build balance,
strength, 
     response and obedience. By the way, I suggest you always wear
gloves 
     while longeing, use a good 30' cotton line and a decent longe whip.
     
     
     Hunter's Bump-- A true hunter's bump is from straining of soft
tissue 
     connections (ligaments?) in the sacroliliac area if I remember 
     right.Wish I had one of my vet books here to look it up. The reason
     for the name is the strain of jumping too high, too soon could
cause 
     this injury in horses being trained over fences, hence hunter's
bump. 
     You'll occasionally see this on hunter/jumpers. I think there is
some 
     thickening of tissue in the area as it heals or something. It just 
     becomes a blemish in time. Since the person who asked about this
has 
     two brothers that have "bumps" in this area I would question if
this 
     is really hunter's bump but more likely just a conformational
thing. 
     I've certainly seen lot's of Arabs with "peaky" hindends and many
of 
     them are unbroke young horses. Yeah, it bears some similarity in 
     appearence to hunter's bump but isn't the same thing I'm sure.
Doubt 
     they're all out ther straining their sacroliliac's in the field.
     
     
     
     Bonnie Snodgrass