Ava, Nathan, Matt, & Dahlia ride down in the elevator together. When Dahlia gets off it says it's the 5th floor in the elevator and on the wall just outside the elevator when she gets off. Matt gets out on the same floor but it says it's the 6th floor on the wall outside the elevator.
Matt says that "Not Today" is from Gwme of Thrones season 8. It's actually from the first season, where fencing instructor Syrio Forel tells Arya that this is what you should day to the God of death.