She began her fictional life as a supporting character in the Johnny Thunder strip in Flash Comics, and so in three of her first five appearances she and Johnny find themselves falling from great heights—dropped out of a helicopter, blown sky high in an explosion, tied to giant firecracker rockets—only to be saved at the last minute by Johnny's Thunderbolt.
Black Canary still seems to find herself in the same sorts of predicaments though. In her second solo feature she and her companion are thrown off the top of a building by a rotating dance floor and seem to be plummeting to their deaths. How can the Canary get out of this one without the Thunderbolt?!