Monday morning I _tried_ to toss a 10' length of 2" iron pipe over a6' chain link fence; somehow it bounced back and hit me in the head. It knocked me to my knees and I was stunned for a minute, but no real damage was done. I was wearing my "Mickey Mouse ears" at the time (I was running the snowblower) and later found them on the ground about 8' away from me. Also, I recall a very loud noise when I was struck. I'm convinced that those hearing protectors saved me from a serious injury.
I guess that the moral of the story is that you don't have to wait30 - 40 years to realize the benefits of wearing hearing protection. Or, maybe, it's that you should be careful when you're tossing 10' lengths of pipe around.
BTW, the hearing protectors (Peltor) seem to have survived with only a scuff mark.
If the lady inquiring about bending pipe is reading this - this method doesn't work too well. The pipe appears to be just as straight as ever.
R, Tom Q.