Interesting observation here: earlier this year I was on a MIA -MAD flight that was cancelled because of MX around 2am after hours of waiting for repair or new plane. We were offloaded off of one 777 and in the terminal I noticed 2 or 3 of the flight attendants on the cancelled flight strolling down the concourse with F pillows and blankets. Not sure what they wanted them for or why they took them.