Paf said:Street workout guys call this move "one arm planche"
No the body is facing more sideways than down. One arm planche would be with the torso facing down. A lot of street workout athletes have more of a flag than a one arm planche. I saw a picture of a handbalancer doing a one arm planche on someone's head before, but I can't find it right now. Below is a video of a one arm planche.