This starting procedure was originally introduced in the 1920s to prevent false starts. Back then, all drivers even had to lift their bonnets before the race so that no one could start the engine unnoticed. They were only allowed to set off after the official starting signal. The starting line was deliberately positioned on the opposite side of the track to ensure that no one set off too early.
Even though the race lasted 24 hours, this short sprint was a moment full of pressure – and nerves. Olivier Gendebien, a four-time Le Mans winner, later recalled how his team-mate Phil Hill had become restless days before the race. The mere thought of standing motionless next to the car for several minutes whilst thousands watched was enough to fray the nerves. Some drivers practised the sprint the evening before – not because of the track, but because of the stage.