His mind having devolved into that of a socially maladjusted moron, his body began to grow. Larger and larger, muscle piling on muscle, hair sprouting everywhere as his crotch distended, a gigantic and lengthening cock ripping through the fabric and becoming erect, a huge missile of meat the size of a baseball bat or one of those giant dried Italian salamis while Todd towered over eight feet tall and nearly that wide with pure muscle.
"Dirty, dirty, fuck-fuck-fuck..." Todd rumbled.
The old man cackled evilly. His combination of the Mr. Hyde and Mr. Universe formulas had worked even better than he had expected. "Yes, you are a dirty fuck, aren't you?" he cackled. "Now get out of my shop. I need to get ready for the next customer."
"Fuck you," Todd rumbled, his brain almost hard-wired to Tourette's syndrome vocabulary. "Fuck you. Fuck fuck fuck." He leered down at the old man, a new, and dirty, if incredibly obvious thought, slowly forming in his moronic mind.
The same thought formed in the old man's mind as he looked up at the giant Todd-Hyde and he whispered, "Oh fuck...."
Todd giggled in agreement, grabbing the man and saying, "Fuck you! Fuck you! Fuck you!" over and over as he did just that. He didn't bother with the nicety of pulling down the old man's pant, just forced his giant dick through them with all his strength, then continued on, the old man screaming as his torso was impaled on the giant's three-foot member, then he stopped screaming as his lungs were crushed from inside and Todd literally fucked his brains out, a supercharged load of jism going straight through the ripped arteries and exploding his skull.
Todd sighed in pleasure, still fondling his giant cock throught the condom of the old man's corpse, looking down at the pop-top skull dribbling out with brains and blood and jizz. Then he looked at the open blender. Then another dirty but incredibly obvious thought formed in his moronic mind.
The brains liquified very quickly, blending with the jizz and blood and the dregs of the Hyde smoothie to make a dainty pink protein shake, which Todd chugged in one go.
The potion churned in Todd's inards, and then a memory locked deep in his subconscious rose to the surface. It was this: Cannibals in Africa had discovered that drinking the spinal fluid of decapitated enemies gave them a brief intelligence boost, as the fluid is filled with neurotransmitters, and science had backed this up (though understandably there hadn't been many university studies to test the degree). This was followed by another thought: Ancient shamanic practice had it that a warrior would eat the part of his enemy he most admired to take in that part of his strength.
These thoughts were followed by other, including ones about morality and such, and Todd's mind was restored, except that it was struggling to process the fact that he was now a giant oversexed beast man cannibal with the corpse of an evil shopkeeper still impaled on his dick.