I guess it's the bomb jump. To make Links recovery really long, to turn you around so you can use your hookshot or just to make a high recovery(useful vs peach), you can use the bombs to cancel your own UpB. The knockback from the blast will send you a good distance in the direction you choose and you will also regain your UpB. To perform a bomb jump recovery, you pull a bomb, smash throw it upwards(I prefer to do it with the C-stick), then UpB and get the last swing of the UpB to connect with the bomb destroying it. The bomb should be somewhere at links neck when you swing your last swing. When bomb explodes make sure that you immediately slam the control stick in the direction you want to recover, this will make the most use of the bomb blasts knockback.
so basically to bomb jump:
double jump, pull a bomb -> smash throw the bomb upwards -> UpB and hit the bomb with the last swing(bomb should be at links neck) -> slam the stick towards the stage
It's incredible satisfying to bomb jump.