I almost always focus the bulk of my attention on tormenting and abusing a man's balls, so I thought I'd diverge from that theme to instead attack a man's mighty bull cock.
In this image, a bound muscle giant is hanging helpless from a large wheel, and his magnificent member is resting heavily atop a huge anvil-like surface. This pedestal is unusual, however, in the fact that it has a large channel cut down the center, effectively splitting the pedestal into two halves. The channel is wide enough for the head of the mechanically-powered sledge hammer to pass in between.
Unfortunately for our hunky hero, his massive schlong is trapped between the hammer and the pedestal.
The hammer has been pounding away at the guy's powerful pud for quite some time now, and the tough flesh and fibers of that titanic tumescent tubesteak have thus far resisted all attempts to snap it in half. But after hours of relentless beating in the same mid-shaft location, over and over and over again, the stud's mighty cock is starting to weaken. Each blow now causes the humongous dork to bend and twist in a disturbingly unnatural fashion, emitting sounds reminiscent of the crackling of cartilage. It won't be long now before that great bull penis finally caves in, cracking in half and allowing the giant hammer head to finally pass all the way through the narrow channel.