Cave-in Weird Explosion? (not good)

[Romulator]

Is there a reason why you cannot look at how Frictional Games did it in their level? I believe it was in the Storage. It follows the same, if not, similar principle.

I'm also not fully understanding exactly what you want. Can you explain to me the sequence of events you want?

Example:
Player places Bomb at rock.
Flame effects occur (?).
Drop rock into bomb...