"C'mon, where's that ruler..." Jim muttered, looking through the drawers. He was aware that his underwear and shorts were now painfully tight. Moving on to the next drawer, he found it empty, and the next one full of random supplies, none of them a ruler.
Annoyed, Jim stood up and nearly fell over. "Woah... uhhh...." he murmured, looking down at his shorts. They were packed completely full at the front, the zipper straining not to give way.
"So tight...." he moaned.
Suddenly with a loud RIIIIIIIIIIIIIIIIIIIIP sound, the zipper on Jim's shorts ripped free. Instantly Jim's underwear expanded outwards, and Jim felt relief as his package experienced just a bit more breathing room.
"Holy shit" he breathed, looking down. Reaching into his shorts, his cock felt impossibly thick - and still growing thicker! With a start, Jim realized he never removed the growth from his genitals. He tried to start walking, but he found that if he walked any faster than a snail's pace, his bulge bobbed and swung, making it hard for him to balance himself. "This won't work" he mused.
Reaching into his shorts again, Jim rearranged his cock so that it was hanging down one of his legs. His eyes opened wide when he saw his cock head hang out of the leg of his shorts for all to see. And it was still lengthening, growing ever longer before his eyes.
Trying to walk again, he cringed at the new sensation of his cock brushing against his leg - it was so foreign and unnatural. But at least he could walk. But when he came to the stairs, he had a problem. He couldn't bend his leg to walk up the steps, because his cock was traveling down it, and his balls were taking up so much space at the front of his shorts, he couldn't bend down.
Not caring at this point, Jim pulled the ripped shorts off. His severely strained underwear was now the only thing providing any support to his genitals. Jim ignored the weight of his growing balls in his groin and as best he could walked up the stairs. He finally made it just as he felt a strange "blanket" sensation on his cock. Looking down, Jim realized that his cock was now so long that it touched the floor - even while he was standing up!
"This is too far" Jim said, suddenly a bit nervous. He managed to get the balloon and blow it up with a shaky breath. "Control the size of my cock and balls" and let the air out, relaxing more when his cock and balls shrunk back. He almost jumped for joy when they were finally back to his old size. "Release" he said, and wondered what he should do.