Individual Level speedrun - Subway Showdown - Disciple difficulty - PC EU - done in 0:51 (50s 933ms) starting from the first skippable cutscene up to the final loading screen.

0:04 Running into the train tracks is the fastest way to trigger the train. 0:09 Once triggered, Smith will conveniently stand still in front of the oncoming train, giving us a free attack. I push him into it with the jump throw because it has a good trajectory and no slow motion involved. 0:45 The long slide is actually jump-cancellable, no need to wait for the entire animation to end.