Fast Swim
Fast swimming is a technique that allows Jak to swim faster than usual. It is performed by tapping the analog stick forward and allowing it to return to neutral in a regular rhythm.
Fast swimming can be performed in Jak and Daxter: The Precursor Legacy, Jak II: Renegade, and Jak 3.
Technical
Jak's swimming animation consists of a section where he moves fast, followed by a section in which he moves more slowly. By repeatedly tapping the analog stick forward and allowing it to return to neutral, only the first part of the animation is completed, allowing the player to use only the fast part of the animation repeatedly without the slow part being used.
Discovery
The earliest mention of fast swimming in Jak and Daxter dates back to December 11, 2001, in an article published on Cheatcc.com. It is not currently known how or by whom this technique was discovered.