After being sealed in the egg that somehow has light the wall start to move and shift and grasp onto your immobile prone body holding you still.
Then a thick white cord from the wall creeps near you and eyes up your bellybutton and slibers closer until it starts to slide inside it and to your organs you let out a slight moan before the pain subsides and phases.
The first physical change that you notice is that you are losing body fat in all places as it feels as if its being melted away into the tube in your bellybutton. Then muscle start to grow and tone until you are considered fit but not quite a professional boxer able to kill with one punch or a WWE wrestler able to break chair and table in one punch but still you feel stronger.
The next thing that happens is that your skin turns to a blackish purple and your feet become clawed and forked and finger become sticky and clawed. Your hair start to fall out and your ear shrink into your head and your mouth splits and become more like an arachnids. your abdominal area is the next to change as it shift and gets enclosed by a hard shell to protect it, then the behind began to shift into a point. Then from the ribs shot out two extra spider legs on each side, sending shooting pain through throughout your body.
As this pain caused you burst out of the egg and the cord snapped on exit.
You kneel on shaky legs and cried as you realise you are no longer a human but a spider.
You look up to see that now there were now countless round objects. Eggs. Just like the one you emerged from.