The vehicle / driving rules are woefully undetailed, so I'll be making a lot of this up as I go along.
It seems logical that the driver of the Bulldog would drive evasively to avoid the grenade, even though the grenade is an area attack and dodging might accomplish precisely nothing.
Driver dodging Sam's grenade with Reaction + Intuition:
5 hitsThat equals Sam's hits, which is great, but now what. Normally I would say that the target is 5 meters away from the grenade, but in this case the driver doesn't have 5 meters of road to work with. We'll say that the driver moves into the left lane (3 meters away) but can't go any further without swandiving off the cliff to your left or plowing into the trees lining the road to the right.
Sam can trigger the grenade to go off at the correct range, so the vehicle is still subject to 18P +5AP. Odds are the vehicle won't care, but theoretically the ork in the passenger seat (who has his window down) and the tires could be.
Subtracting 3 meters due to the dodge, that brings the damage code down to 15P +5AP.
The ork is busy shooting Wolf, so he's unaware and can't dodge himself. I will say that vehicle occupants benefit from being in good cover since (they are still covered from the waist down). Good cover:
2 hits, so the ork gets to soak 13P +5AP.
Ork soak (Body + Armor + AP):
8 hitsStaged damage with AP does not exceed Ork's Armor rating, so the Ork takes
5 Stun.
The Bulldog itself has Armor 12, staged to 17 with the frag grenade's AP. With hardened armor that means that the frag grenade needs a direct hit before it can begin to affect the vehicle. The Bulldog loses some paint.
Question now is what happens to tires and other passenger-side windows. I'm going to say the windows are ballistics glass and have Structure 4 + Armor 6. If the grenade does 4+ boxes of damage then they break. Soaking:
2 hits, pathetic. Windows shatter.
Same story for tires, except Structure 2 + Armor 4. Soaking:
5 hits, better, but still not enough. The tires are pierced, but are run-flat tires.
Now the passengers on the right side of the vehicle have to soak the remaining damage that made it through the windows. That's the troll with the shotgun and someone you haven't identified yet.
Troll soak:
5 hitsDamage does not exceed Troll's armor rating, so the final verdict is
6 Stun.
Other goon soak:
5 hits, fine time for the goons to roll poorly
Damage does not exceed Unknown's armor rating, so the final verdict is
6 Stun.
That's the grenade. The driver of the Bulldog now needs to make a control test.
Driver (Reaction + Pilot Ground Craft - Terrain Modifiers [Vehicle Handling 3]):
3 hits, threshold was 2 so vehicle remains under control
Now, the revenge. The passenger in the Tata is going to Fireball Sam (or, more precisely, lob a Fireball at Sam's arm).
Fireball: Magic + Spellcasting - Target in Moving Vehicle:
3 hits, threshold 3 so no scatter
Soaking Drain:
3 hits, results hidden
Sam is in a restricted position (sitting, confined, and arm sticking out the window) and can't dodge the area attack effectively. I may allow him to use Run for Your Life if he drops the Ares Alpha, but it will only allow him to move reduce the DV by 2.
Base damage is
12DV -6AP.
While soaking, add
4 dice for Good Cover and
3 dice from Katsina's counterspelling. Don't forget your Armor Jacket has
Fire Resistance 2. That should be Body 10 + Troll Dermals 1 + Armor 12 + Fire Resistance 2 + Titanium Bone Lacing 6 (it's unclear to me on Ryo's sheet if Sam's Body attribute reflects the +3 from the bone lacing or not, but for now we'll say they are separate) + Good Cover 4 + Counterspelling 3 - 6 AP =
32 dice, no problem.
RV soaking the damage (Body 16 + Armor 14 - 6 AP):
8 hitsThat stages the damage down to 4P. This does not exceed the modified Armor value ( 8 ) so the RV itself is unharmed.
The RV's front right tires aren't as lucky. No armor and no Katsina counterspelling means they don't have the dice pool to resist the attack. Front right tire is gone.
RV's autopilot makes a control test, -2 for missing a tire (run-flat does not mean run-gone) and -2 for Terrain Modifiers. It needs 2 hits on 2 dice so this will probably suck.
Snake-eyes! Critical glitch!Well this should be fairly spectacular.
To be continued!