This is very similar to "Psycho Edward", but not really.
All you have to do is cast Berserk on Kain while he's given the command to Jump.
It may help to prolong his delay to Jump to see this in action.
Doing this will allow Jump to deal damage that the Berserk bonus would have applied to Jump (not normally possible, but just humor the idea).
This bug started in the WSC version, and is also applicable to FF4A US and Jap 1.0.
It was fixed in FF4A Euro and Jap 1.1 versions.
Topic: FF4A - "Berserked Jump" (Read 736 times)