After the initial volumous spurt of cum, Adam's cock goes soft. He keeps thinking something should happen. His muscles should hulk out. Or he should grow taller or more endowed, but nothing happens. He shrugs no longer feeling horny, Adam gets dressed. Now he's really hungry, so he heads straight for the dorm dining room.
As he charges down the hallway, Adam barrels straight into a tiny freshman. Adam's body is completely overshadowing and crushing the 4'8" kid. At least at first. Then Adam feels the guy beneath him begin to grow bigger. The powder didn't make Adam large, it made Adam an enlarger.
Adam's head is forced backward as the little guy beneath him's head shoots out. The freshman now had to be at least 8 feet tall compared to Adam.