This explenation is stupid. He knew of allll of this detailed information, and vent in there anyway, but because he forgot, then he suddenly remembered after seeing the last goblin mage and hurry off to the woman 'to protect her'.. stupid writing, stupid story, I call BS.
Well to be fair it was such a long time that he got into a 3rd class dungeon and as he stated top ranking players don't really bother going in to them unlike beginners, so it's only natural some bits of information will be forgotten be him considering the vast information on the game. What can you say, just a trait of being a human...He gave a logical and justifiable reason how he got into this mess...
But it still felt forced to progress the elf companions story, not to mention how did a guy like him who does everything perfectly and efficiently just become a slob out of nowhere AND miss a gob is kind of silly.