Which great films run under 100 minutes?

A question worth digging into, because the assumption that longer automatically means more serious or ambitious is one of cinema's most persistent myths. A few that hold up as genuinely great within that runtime constraint. Detour (1945) runs around 68 minutes and is a masterclass in noir fatalism, doing more with mood and moral collapse than most films twice its length. Night of the Hunter (1955) clocks in just under 93 minutes and remains one of the most visually distinctive American films ever made, operating almost like a fable. Rashomon at 88 minutes is a clean answer for anyone who wants to cite Kurosawa. The Swimmer (1968) at 94 minutes is criminally underappreciated as a slow-burn existential drama, and it fits the brief perfectly. The broader point is that brevity can be a form of discipline rather than a limitation. Some stories know exactly when they are finished, and that self-awareness shows in the pacing. What else belongs on this list?