That reminds me, there's a similar weird movement effect in Episode I--at the beginning where the Jedi are fighting the droids and the Droideka's roll up, they shoot the doors and there's an explosion and then the Jedi run away. In the shot with the explosion it's like the Jedi teleport across the screen, it's really weird looking. You don't really notice it since usually you would be paying attention to the explosion.
Yeah its supposed to be some kind of Jedi "super speed." No Jedi ever uses it again (except maybe Mace once in the CW cartoon) which led to a lot of people complaining back in 1999 that Obi-Wan should have used it to charge down the catwalk when Qui Gon was fighting Maul by himself instead of just running normally.