Commercial Fixed Wing
Flight Attendant Current
Physiological - Other; Situational Awareness; Time Pressure; Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Passenger Misconduct
General None Reported / Taken
Human Factors; Environment - Non Weather Related
I was making my final walk through during taxi.  I made it to the back of the aircraft.  I made my checks and then the B Flight Attendant said there was a passenger being unruly during the safety briefing.  I had her point him out.  He was making snide remarks about the masks when they were mentioned in the PA's.  As I was conducting my walk through back to the front of the aircraft; I noticed this passenger had his mask down.  I asked him to return his mask and started to confirm with him his compliance and need to not interject during announcements.  During this conversation; we received the cleared for departure ding.  The B Flight Attendant was not in a jump seat but was in the galley confirming I had the correct passenger and keeping an eye on me.  I was trying to gain compliance from the passenger when the aircraft began to take off.  I was in the middle of the cabin dealing with this passenger and had to end the conversation and climb my way into my jump seat.  I did not confirm that we were cleared for departure with the pilots; nor did any other crew member.
Flight Attendant reported standing in the aisle talking with a non-compliant passenger regarding face mask policy when the aircraft began the takeoff roll.