Alfred Hitchcock’s 1958 Physiological Thriller.
During a police chase across the rooftops of San Francisco Detective John "Scottie" Ferguson almost falls and discovers his fear of heights. His partner tries to save him, slips and falls to his death.
This opening seen of the film made me feel quite nervous, as it showed ‘scottie’ looking down the length of the building which showed how high he was.
Vertigo. 1958. [DVD] Directed by Alfred Hitchcock. USA: Universal Studios.