prone out

verb2

1. •
   To lie flat on one's board (face down) in order to be propelled shorewards by a broken wave.

   • I proned out in the white water, letting the wave break over me inside, riding the white water into the deep channel. — 2012
2. •
   To order or cause a person to lie prone on the ground, usually at gunpoint and to effect a high-risk arrest.