"Whatever, I'm going to be a bug anyway in like a few hours, I'm gonna go ahead and try this now," thought Dan.
He stepped outside and felt the warm outside air go through his breathing tubes while he sampled the scents with his antenna.
"Ah, smells like nature," he thought to himself.
Dan snuck over to the part of his yard that was farthest from his nosiest neighbor and tried flapping his wings again. He was amazed at how fast he could get them moving without really even thinking about it at all. Before long, he was about two meters off the ground listening contentedly to the buzzing of his wings behind him.
"Well, at least I can fly," he thought with a grin. He felt a tad guilty about taking pleasure in his loss of humanity, but it's not like he could do anything about it. If his sister's a witch, he might as well look on the bright side.
A stiffening sensation washed over Dan's body while he was up in the air still buzzing his wings. A tightening, constricted feeling encased his chest and caused him to double over in pain--but still his wings kept him in the air! He finally felt the hard casing that had formed around his torso. It was tightening, and tightening, and...
CRACK!
The hard plastic-like casing locked in place, and Dan felt a bunch of his own organs gush out of his new insectoid thorax into a massive sack that formed out of his rear. The exoskeleton hardened over this section, too, which was much larger and became his new abdomen. Finally even his scalp and most of his face disappeared behind a rigid coat of chitin. His eyes and mouth were still human, but he knew that was soon to change. He really looked like some sort of flying insect at this point, except he was still the size of a person.
When it was finally over, Dan looked around and realized that in his lack of attention to his newfound flight, he had buzzed himself way up past the heights of the tallest trees in the neighborhood. There were now people on the sidewalks gawking taking pictures on smartphones.
"Oh, no, I can't have them see me landing down at my house," Dan realized silently. "I've gotta get outa here quick."
He flew away over the houses and out of the suburb into the farms and forests outside the town. Cars stopped and honked and flashed their lights at each other as he passed over. Finally he was far enough away from any major routes that very few people if anyone was seeing him or identifying his flight path. His wings finally did start to tire out a little bit, and finally Dan found a creek in a meadow where he could get some water and hopefully wait out the rest of his transformation in peace.