Erick watched himself in a nearby mirror as he continued growing. He was already pretty much naked, since he had ripped through his clothes a few moments ago. He hit a most muscular flex, amazed at how large his muscles were.
His arms, chest and shoulders swelled before his eyes, becoming larger with each passing second. His leg muscles grew bigger, pushing past the tattered remains of his pants to showcase tree trunk-sized quads and hamstrings.
Erick gasped as his muscles continued to expand and his shirt finally gave up, falling helplessly to the floor. He flexed his arms and those baseball-sized biceps blossomed forth and quickly loomed bigger. Erick smiled as the shot of strength tickled his body and his biceps surged up to the size of softballs. He flexed his biceps harder and they surged forward with deep splits, swelling ever larger.
He grew a few more inches in height, making him 6'9" now. Erick looked down at the weight in his hands. It read "450 pounds." He carelessly dropped it on the floor and it thudded mightily on the hard oak floorboards.
Erick made a few flexes in he mirror, astounded at how large he was now. He had a 75 inch chest and shoulders that had to be more than two feet wide, with deltoids that loomed like cannonballs on his large frame.
He flexed, happy to see a 25 inch bicep rise up, the triceps dipping low underneath, every muscle in his arm rising to prominence.
"Wow," he said, lowering his arm. "This is unreal!"