Crossword Clue:

to drop straight down

Answer	Crossword Clue
OXYGENMASK	Drop-down item that hopefully doesn't have to
PLUMB	Straight down
NOSEDIVED	Headed straight down

PLUMMETS	Drops straight down.
PLUMMET	Fall straight down.
SCHUSSED	Skiied straight down
PLUMMET	Go straight down
ERECT	Straight up and down
SSE	Almost straight down, for short
SSE	Not quite straight down, briefly
SCHUSS	Ski quickly straight down a hill

SSE	Almost straight down, on a map
STEEP	Almost straight up and down, as a cliff
SIXAM	When hands are extended straight up and down