Gashur tries to claw the ooze one last time as it starts to retreat. He then waits for a few moments, letting it withdraw deeper into the hole not to get himself caught into a melee on the edge, then approaches the edge and looks if he can put one more javelin into that goo. He keeps remaining javelins for other uses. "This should have served as a lesson if only those things were able to learn. Can you give me those stones now? I'll see if I can drive it further."

Spoiler
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Claw AoO: (1d20+11)[29] for (1d8+11)[18] ref (1d20+4)[22] (natural reach vs withdraw, if applicable)
Cold iron javelin: (1d20+2)[16] for (1d8+6)[9] (while fatigued after the rage)

Perception (1d20+8)[16] (darkvision 120)