Stealth knocking out a super soldier

“We are now on the helicopter,” Stealth said in a loud, clear voice.
Her hands slashed through the air, the left arm still trailing both handcuffs. The open palms slammed against his ears and the super-soldier felt a wave of pain and dizziness as his eardrums ruptured. Her legs whipped up and back as she drove her heels into his kneecaps. As he staggered back she grabbed his jacket and pulled herself up to crack her head into the bridge of his nose. The floor tilted and Hayes was pitched out the Black Hawk’s open door.
Polk tried to shrug off his harness and stand up. She slammed both heels into his chest. Before he recovered she spun on her hands and circled his head with her feet. The chain of her shackles pulled tight on his throat. She jack-knifed her body up and drove four punches into his forehead one after the other. He tried to block them but she was too fast and her calves were in the way. By the fourth one Polk was hanging loose in the harness. She swung back down, untwisted the shackle chain, and flipped back to her feet.

Excerpt From Ex-Patriots, pg 579
Peter Clines
https://books.apple.com/us/book/ex-patriots/id585738393