[Lenneth]

The body is pretty good at self-repair. I don't know of any male who has not been unlucky enough to get a severe impact to the testicles; in my case, when my son was about 3, whilst turning over in his sleep (he was between us at the time) I got the full 180 degree arc of his leg moving at about 10 miles an hour.

I think you'd need a pretty severe impact to cause irreparable damage.

B.

16' long by 3" square solid box weighing 65lbs driven upwards by the force of a 50lb box falling from a height of approx 10' on an overhanging part of the long box (overhanging by approx 8') creating a fulcrum and driving the long box unexpectedly upwards and into the nuts....