Date: 201810
Location: ZZZ.Airport, US
Aircraft: B757 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Taxi
ATC / advisory: Ground ZZZ
Reporter organization: Air Carrier
Reporter function: Flight Attendant (On Duty)
Reporter qualification: Flight Attendant Current
Human factors: Time Pressure; Communication Breakdown; Situational Awareness
Second reporter function: Flight Attendant (On Duty)
Anomaly: Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Attendant
When detected: Taxi
Contributing factors: Human Factors; Procedure
Primary problem: Procedure

Narrative: At the exact time the doors were being armed; a deadheader was converted to work the flight. She was seated at a window seat and had to have the entire row get up to get out. Other people also got up to switch seats at this time. We had around 6 people standing in the aisle; the door arming announcement had not been made yet and the Captain began to push back from the gate. The cockpit door was still open. Myself and the purser began to run up to the cockpit to inform them the doors were not confirmed armed yet; the all call was not yet initiated and the cockpit door was still open and there were multiple people standing in the aisle falling over onto each other because of the illegal pushback.The Captain looked back at us [and] told us it was fine and we would only be taxiing for a few more minutes. A [rewards passenger] seated in 2B was very off put and said she had never seen a Captain do this before and that she was frightened by the event. The crew all agreed we had never seen anything like it. Still taxiing with the cockpit door open; the purser initiated the all call; had everyone seated; and then closed the cockpit door. We played the safety demo. As soon as it was complete the Captain said 'Flight attendants please be seated for departure.' Before he finished the announcement he was already on the runway full speed ahead taking off. This caused myself to fall into my jumpseat as the passengers in exit row at 2L reached out to help.I looked to the back galley to see two flight attendants holding onto the carts; not in their jumpseats because they could not get to them in time as we are now off the ground and heading up into the air. The third flight attendant (who was supposed to be seated at 2R) was halfway down the economy aisle when the Captain took off with the short warning. She had to run to the back of the airplane as the Captain pulled the plane up. 3 of 5 flight attendants were either not in their assigned jumpseats or not in a jumpseat at all because of this Captain. Final safety checks were not able to be performed throughout the entire cabin.


Second narrative: Boarding finished; boarding door closed. Flight attendants in process of arming doors. Captain/pilots start pushing back/reversing airplane with 4 doors disarmed and cockpit door open. Flight attendant/purser tells Captain we are not ready yet - not all doors are armed and cockpit door was not closed. Airplane was still being pushed back while doors are in the process of being armed and the cockpit door was not closed. After safety video presentation cabin safety walkthrough checks.After the safety video; I proceed to do my safety checks from standing at my position at row 7. As I walk by the exit row (row 21); I hear the flight attendant prepare for takeoff announcement. I then hear the engines revving and the pilots soon start moving the plane - fast. I had to run to my jumpseat and strap in as we were lifting off. The other flight attendant; who was supposed to sit at door 2 was also caught off guard (her demo standing position was at row 30). She ended up sitting back at door 4 with myself and the other flight attendant. The pilots gave us no time between the prepare for landing announcement and actual take off.


Synopsis: B757 flight attendants reported pushback; taxi and takeoff occurred with minimal contact and time provided by the flight crew; and contrary to SOP.