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 and arachnids. your manhood is the next to change as it shift and gets enclosed by a hard shell to protect it, then his behind began to shift into a point. Then from his ribs shot out three spider legs on each side shooting pain through tout your body.
As this pain caused you burst out of the egg and the cord snapped on his exit.
You kneel in a fertile position and cried as you realise you are no longer a human but nor a spider but a hybrid of both...