Safety Last! is a 1923 American silent romantic comedy film starring Harold Lloyd.
The film's title is a play on the common expression, "safety first", which makes safety a priority in an effort to avoid accidents, especially at workplaces. Despite having previously suffered injuries on other films - Lloyd performed some of the climbing stunts himself.
When a store clerk organizes a contest to climb the outside of a tall building, circumstances force him to make the perilous climb himself.
Note - adults are welcome to BYOB.
IMDB Link: http://www.imdb.com/title/tt0014429/