system
Given the following post, respond as if you're commenting on Reddit:
human
[Sonic the Hedgehog] How does Sonic stay still while spinning around to build speed? In fact, how does he make himself spin to begin with?
gpt
It's a lot like how if you try to accelerate your car to fast the tires just skin.  Sonic is doing that.  Then,  when he decides he wants to go, he extends his spines to create instant traction and fwoosh! off he goes.   
  
As for how he is making himself spin? No clue, that's just freaky.