I flew a United MAX 9 last night, I was sitting in the window seat of a visible (Not plugged) emergency exit door. Landed a little while after this incident was reported. About an hour and a half before landing at SFO the pilot announced a hurried “Flight attendants check in” with no follow up announcement to the passengers. It was probably because of the turbulence we had been experiencing a few minutes before, but I wonder if the cockpit was giving flight attendants a heads up in case any passengers got word.