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How big an explosion are we talking here?

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obryn:
OK, the story can come later, but here's the basic setup.

My d20 CoC party looted an armory and then came up against the fruits of a previously-failed mission.  (Basically, a 12'-tall angry, walking orgy.  Like I said, the story will come later.)

One of the PCs ran off and grabbed a big ol' duffel bag they'd filled with 6 grenades and boxes of ammo.  While the abomination was busy tearing one of their companions limb from limb, he pulled a pin on one of the grenades, kicked it into the blast-secured lab where the creature was, and ran like a bitch.

I have absolutely no idea how well this would work, but I gave him a big, satisfying explosion.

So I'm asking you - how well would this work?  How big a boom are we talking?

-O

Varaj:
I am no expert but the I believe the explosion would be relatively small.  A good amount of shrapnel would fly about.  Grenades kill with shrapnel not with the explosion.  I don't believe it would be likely the other grenades and ammo would explode either.

Krishnath:

--- Quote from: Varaj ---I am no expert but the I believe the explosion would be relatively small.  A good amount of shrapnel would fly about.  Grenades kill with shrapnel not with the explosion.  I don't believe it would be likely the other grenades and ammo would explode either.
--- End quote ---

Would that not depend on the type of grenade? There are at least three types of grenades I know of, Concussion, Incindiary, and Shrapnel.

Shrapnel grenades would act as you said, not much of an explosion, but lots of shrapnel flying round.

Concussion Grenades on the other hand would create quite an explosion, and would without a doubt cause the other grenades to blow as well.

Incindiary Grenades would create a decent sized explosion and cause lots of flame and fire, they would also trigger the remaining grenades.

Varaj:

--- Quote from: Krishnath ---Would that not depend on the type of grenade? There are at least three types of grenades I know of, Concussion, Incindiary, and Shrapnel.

Shrapnel grenades would act as you said, not much of an explosion, but lots of shrapnel flying round.

Concussion Grenades on the other hand would create quite an explosion, and would without a doubt cause the other grenades to blow as well.

Incendiary Grenades would create a decent sized explosion and cause lots of flame and fire, they would also trigger the remaining grenades.
--- End quote ---


Again this is just my understanding which could be wrong.
Concussion grenades are meant to stun not kill per se.  So the explosion will be more contained but still not very lethal.  Expect eardrums to be gone.
Incendiary grenades have very little explosive power but scatter burning metal around.  All oxygen consumed and room gets very hot.

obryn:
I had a reply but it died when the board did :)

Anyway, they were all frag grenades.  I guess my story is going to be that earlier frag grenades & general mayhem by the abomination created a gas leak in the lab, and then sparks from the frag grenade ignited the gas.

Hooray for retroactive DMing!

-O

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