Gashur throws down two stones to follow the javelin and gets a hold of the third, but then shakes his head. "Nah, got away. Let me breathe a little and go ahead with the doors. I'll want to meet whatever's behind them while the spells are still hot." Having said that, Gashur takes a good look into the hole and goes back to pick up his long-shafted weapon.
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Treating the stones as improvised weapons doing 1d2 base damage. Not counting range increments. Still fatigued for the rest of the minute.
Random stone: (1d20-2)[2] for (1d2+6)[7]
Random stone: (1d20-2)[0] for (1d2+6)[7]