I think we have all done it at some point in our career, forget to put the squad in park. For this deputy in Ohio, it was on a traffic stop recorded by his own dash camera.
I did it once responding to an alarm call. Lucky for me my squad just rolled across a parking lot and stopped aginst the curb. Imagine my surprise to come outside thinking my car was on the west side of the building and seeing it on the east side.
Be sure to check out my series of thriller novels.