My criticism of this is the same as your Tambora recreation: the eruption is over after the first explosion. Additionally, it fails to capture the landslide that happened in real life, though I recognize the attempt to recreate it. I'd suggest implementing a delay of sorts, that would allow the landslide to start before the eruption begins. Otherwise this is quite good, and there's much potential here. No-vote for now.
why does it spit out sawdust?
Everything's gonna fall down to the ground and turn grey.
I have distinct memories of learning the song in 2nd grade music class
Mount Saint Helens is bout to blow up, and it's gonna be a fine swell day!
For what this is, it is pretty realistic! Nice one. +1