Discovered by XtraX
A BSJ(Bomb Space Jump) is a technique that effectively allows an extra jump worth of height. To perform a BSJ:
1) Move far enough away that the wall you wish to jump off of is out of view in the morph ball camera.
2) Roll backwards towards the wall, and perform a spring jump. (In previous games this was used with bombs hence the name.)
3) Unmorph, and if performed correctly, there will be no unrolling animation. (Instant Unmorph)
4) Proceed as if you were on the ground. All jump techniques that can be performed on the ground can be performed after an Instant Unmorph.
Example of a BSJ - Video
Example of a 2BSJ - Video