Trooper Jess Hernandez of Sheriff's Office of Johnson County, Iowa is alive and unhurt. As you can see in this animated .gif, that was almost not the case. It's a selection from a video made by the dashboard camera on a patrol car, one of two pulled over on a busy night on Intersate 80.
A semi-tractor trailer hit a truck, which careened off the road, sliced off the back of Hernandez's car, then flew into a ditch. You can watch a video of the incident at KCCI News.