Here is that one story.
Im not sure if you have read his story very well. This is what he has to say :-
“After maybe a month or so I noticed a definate increase in flaccid size, which I was happy with. I read that erect gains came later, so I kept going, but didn`t really increase the intensity of my workout. Thinking that I was not getting enough blood into my glans, I did begin to jelq over my glans—I don`t know if this did any harm or not. Also, like some others, I had a hard time not getting too erect when jelqing. I read that you should not jelq fully erect (even though the exact consequences of this always seem to be pretty vague), so I tried to avoid it by stopping to let it subside as I neared full erection. However, I do know that during each session some of my jelqs (don`t remember what proportion) were done at a higher erection level than they probably should have been”
He is slearly saying that he jelqed over his glans which IMO is a bad thing to do. Secondly, jelqing with very high erections is also a bad thing to do . This guy says he did about 100 jelqs which could lead to some blown capillaries.
So you cant really say this guy didnt screw up.
Walk slowly but never backwards.