Hitman: Blood Money Speed Trick

If Agent 47 is reloading a weapon when he approaches a surface he can climb down, he will instead fall down It.

This saves a few seconds, but this is probably already well known since this game has been out for five or six years, and I doubt anyone will re-do any speed runs for this game with this trick. Additionally, there's not too many places where doing this would be useful in a speed run, and If you're doing a Silent Assassin speed run, you put yourself at risk of being caught since this requires you to have a weapon out.