The Chunky Salsa rules are no different, really, the example simply is rather complicated.
actually a little bit differently... now it's a flat x2(x3, x4) IF Chunky Salsa comes into play.
Before, it the damage stacked as "waves" of damage passed through him, up to the max radius of the attack...
SO... so use the mage example above as a template:
Situation: 4 meter wide plascrete alleyway between two skyscrapers. the Defender is standing in the exact middle of the alleyway (for simpliticity), so 2 meters to each wall.
Initiated Mage casts: a Force 24 fireball. directly at the defender...
Attack: Mage rolls dice pool + edge: total is 19 susses
Defender rolls reaction + edge: total is 9
Damage: F(24)+10P
Exceed the Object resistance of his ammo (Ex-Ex), explosives (6kg of C-14) and grenades (6 HE, 6 Frag).
so as those blasts wave goes off for a grenade: (10p 1-/2meters)
Damage: 10.
1: right blast wave travel 2m, hits right wall, bounces back to defender (4m)
Damage: 16.
2: Right blast wave travels to left wall (6m), bounces back to defender (8m)
Damage: 18.
3: : Right blast wave dissipates in 2 metes.
Damage: 18
4: <see #1:, replace RIGHT with LEFT>
Damage: 24.
5: <see #2.....>
Damage: 26.
6: First Grenade done.......
Now it would be a straight up, Damage x3..... Per grenade. C14, and ammo....