Stealth’s acrobatics, stealth, and kick power

On the rooftops below, Stealth flitted like a shadow. She darted between pools of darkness and leaped from building to building. When they got to an intersection she would throw herself out into space, grab his outstretched hands like a trapeze artist, and flip herself across four lanes of open road. Her cloak never made a sound as it billowed in the air.
The two heroes cut across the Wilshire Country Club, the upper-class neighborhoods of Highland, and the wide swath of LaBrea. Stealth killed eleven exes in that first hour, their necks snapped with blinding kicks. St. George just twisted their heads around.

Excerpt From Ex-Heroes, pg 287-288
Peter Clines
https://books.apple.com/us/book/ex-heroes/id585738407