I wrote here that the door on N146CK, the Cirrus SR22 that crashed August 4 at Deer Valley, opened in-flight.  Yesterday, Fox News in Phoenix aired video from a security camera that captured the impact.  Here are frame grabs from the video showing the open door. 

Cirrus Open Door

Cirrus Open Door 2

Usually, when a door pops open in flight, aerodynamic forces keep the door from opening more than an couple of inches, as depicted here.  The door on N146CK was open much more than just a couple of inches.  Of course, the aerodynamic forces operating on this aircraft were far from normal.

Full video here. (Note: the video is disturbing.)