It applies, but for some reason I thought it was only -1. (See n comments in invisible castle)
The second roll was: 14d6.hits(5) → [5,5,3,2,4,2,4,4,1,2,6,1,3,6] = (4). I removed the last die, so mentioned only 3 hits instead of 4. Removing the 2 last dice still gives 3 hits on the second attack.
Surprise roll:
Surprise: Init 10 + Surprise 6 (16d6.hits(5)=7)Extra recoil: Sure, no problem, how much? (And feel free to withdraw them from these shots too, you're the GM, you get to decide on modifiers

)
To be honest, Rafa's concept is pretty much a character who doesn't really see much difference between horizontal, vertical or upside down, high or low, wide or narrow. (I forgot 2 dice on his climbing test last time, he'd normally roll 21 dice for climbing I think, balancing maybe a few less, but still enough to shrug at anything performed in Cirque Du Soleil.)
Maybe a Balance test vs. some threshold (depending on the situation) every hit below the threshold giving a -1 to all physical actions? Though that might be me being cheesy again :p He can probably buy 4-5 hits in most conditions, so unless hanging upside down on a slippery smooth surface in bad weather, it won't matter much....
So yeah, how much recoil are we talking about? If it's real bad, he'll just jump down and fight on the ground.