In reply to jim hughes:
"Could you hurt yourself falling off a boulder Problem?"
Not if its on gritstone. Nowhere does it outcrop high enough.
Its Frictional Properties are so good if you do fall off, youre doing something wrong.
If youre still worried about hurting yourself, i believe the trend is to wait Until it Snows, bury the bottom Two thirds of the route or Problem Under snow, make the one move to the top, then Pretend youve Climbed it. I think this is called snowballing (Although Snowballing actually is a rather nasty sexual act some people are into).
If there is no snow handy, you can still negate the imaginary Fear of hurting yourself by using a sissy mat.
If However, youre bouldering on real rock, ie. Limestone, then yes it can Reach Heights where you can hurt yourself. Quite Badly in fact.