lol, i always get broken blood vessels when i doing standing calf machine raises. At first when i saw the red line on my shoulder, i was like wtf? I thought my cat may have scratched me or something but it kept happening again and again until i realized it was the calf machine that did that. I was never concerned about it though.
not only does it happen with the calf machine, but I also get it when I squat.
In my old gym there used to be a donkey calf raise machine. The one where you rest your lower back against a pad while bending over.
I guess one solution is to have someone sit on your back and stand on a 2x4. Old school Arnold style...
"O mankind! Eat of that which is lawful and wholesome in the earth, and follow not the footsteps of the devil. Lo! he is an open enemy for you." Q(2:168)