[As Eustace jumps out of the cart and approaches the one carrying the dynamite, he considers their situation.]

Fortunately the dragon doesn't seem to be in this area, however it would be dangerous if anyone else were to stumble upon it or worse—it detonates during a fight.

[After studying the pack, he completely diffuses it, ensures that it can't detonate even if it were to be dropped.]

These won't be able to used, but the ones back at the top will need to be removed out of the mountain.