We had to climb another 'flight/set of stairs' to get to the roof.
He tripped on the bottom 'stair' and almost fell.
He waited at the foot/bottom of the 'stairs'.
(..) - Where are ya? I'm here. - Goldie, are you there? - Dad, I'm here. - Dr. Goldman, I've got you. - Down the stairs. - Easy, you guys. - Everybody just slow down. Keep him steady, Violet. Keep him steady. Dad... (..)1996 Foxfire