This is an automated archive made by the Lemmit Bot.

The original was posted on /r/todayilearned by /u/GarysCrispLettuce on 2023-06-27 23:51:49+00:00.

Original Title: TIL that in 2001, a US navy submarine performed an emergency ballast blow maneuver to impress civilians onboard. It surfaced at high speed directly under a Japanese ship and cut it in half, killing 9 on board.