Video: Texas cop appears to throw single punch — and a male is flat on his back a second later

Video shows an Austin, Texas, police officer appearing to throw a single punch — and a male crumpling to the ground and lying flat on his back a second later.

The video is part of a KXAN-TV report about a "crowd control" incident Friday night on Sixth Street, and the station said it received "two witness videos of the scene."

'The action is inexcusable and indefensible.'

One of those videos "appears to show an officer in a blue shirt shoving a bystander in an orange shirt. Another officer wearing a black shirt appears to throw a punch. The man in the orange shirt is later seen on the ground," KXAN said. The male seen lying on the ground also is wearing blue jeans and a backward white baseball cap.

The video included in the station's story — which contains no sound — shows just one an