What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot and (1) passenger initiated a takeoff on runway 29 at kbdr. Conditions were VMC with winds 28012G19KT. The aircraft rotated and the pilot side door opened on rotation. The pilot attempted to close the door during the rotation and lost control. The aircraft pitched down and to the left, leaving the runway. The aircraft impacted the snow bank on the left side of the runway. The propeller blades and nose gear hit first and then both main gear.
As the FAA filed it
THE PILOT AND (1) PASSENGER INITIATED A TAKEOFF ON RUNWAY 29 AT KBDR. CONDITIONS WERE VMC WITH WINDS 28012G19KT. THE AIRCRAFT ROTATED AND THE PILOT SIDE DOOR OPENED ON ROTATION. THE PILOT ATTEMPTED TO CLOSE THE DOOR DURING THE ROTATION AND LOST CONTROL. THE AIRCRAFT PITCHED DOWN AND TO THE LEFT, LEAVING THE RUNWAY. THE AIRCRAFT IMPACTED THE SNOW BANK ON THE LEFT SIDE OF THE RUNWAY. THE PROPELLER BLADES AND NOSE GEAR HIT FIRST AND THEN BOTH MAIN GEAR.