His formula would make him become a robot.
"Well," he said, "If this is going to work, I'd better strip off, I don't want to get tied up in human clothing!"
He stripped down to nothing.
After all, this was for science, and modesty was sort of silly when you were trying to record physical changes.
almost immediately, he felt a sharp tingle. the tingle spread all over his body, from the top of his head to the tips of his fingers to the ends of his toes.
then, there was silence. he started to sneer.
"Obviously nothing would really happen," he said to himself, trying to muster sufficient disdain in his voice. He felt silly and didn't want to admit that part of him had really expected this to work.
Suddenly!
A whirring sound happened in his gut like his guts were starting to be rearranged, in a robotic manner.
'Shit,' he thought, 'probably should lay off of watching the Sci-Fi channel.'
he felt a sudden jolt as parts of him separated. In a flash, he had gained sophisticated ball bearing joints where his bends were, and saw he had become more robotic than a man.
This inspired him, and he began adding more and more sophistication to himself feeling complex gears forming inside of himself, hydraulic oil beginning to pump from an iron heart through heavy rubber tubes that were now his veins. His nipples and bellybutton became bolts and screws, his fingernails and toenails became metal plates, his hair became steel wire, his skin changed to solid silver steel, he clicked and whirred as he moved, and found he could now focus and zoom his eyes as he pleased with sophisticated adjustable lens. When it was all done, a living moving clockwork man had replaced Jonathan. Though somehow still in his visage and figure, he resembled complete machinery instead of flesh, every piece of his frail human body approximated as gears, joints, springs, and steel skin. Also, his penis deflated and shrunk into his body.
"My God." he said, startled at the filtered sound of his own voice, like something from a science fiction program, his streamlined and permanently fixed face not even moving. "I'm handsome."