The Brute that Walks

1st app.- Journey into Mystery #65

Howard Avery was a brilliant, but skinny scientist in love with Sally Barton. Believing that she secretly disapproved of him, he decided to develop a growth serum to make himself more powerful. The serum he created did indeed make him bigger-- but it also transformed him into a hairy monster! Breaking free of his lab, he was assaulted by police officers, but found that their bullets could not harm him. He decided that now he would use his strength to have revenge upon Sally.
The police had overheard the Brute say he was after Sally and had her placed in a cell, but the Brute smashed through the police station, and tore apart her cell. But before he could make off with her, a truck smashed into his right leg, distracting him. Sally ran away into a nearby carnival, and tried to hide in the roller coaster. But the Brute climbed the roller coaster, and tried to grab her as she narrowly avoided him. She fled into the Tunnel of Horrors with the Brute hot on her trail-- but just as he caught up, the formula wore off, and he transformed back into Howard Avery.
With the monster gone, both Sally and the police believed that Howard had driven him off, and he was hailed as a hero. He and Sally reconciled with one another, and the city rewarded him for saving them from the monster. But Howard used his reward only to repay the damaged he had incurred, and destroyed his growth serum.

Credit- marvunapp.com