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'.
(..) Well, boo-hoo. I have the truly awful job here. You wanna talk awful? You wanna go there? Try dragging pounds of stink up a flight of stairs. I barely got him in the bathtub! Bathtub? What... - What do you mean, "bathtub"? - That's another thing, Why you got me (..)2008 TvShow: Breaking Bad Title: Cat's in the Bag... Season: 1 Episode 2