With six left, there are a few to consider:
- the death of the Bane
- the tomb of Borkon
- Malchia the Dragon
- Dragons assault the College
- The fields of Chaos Trolls
- Greymander Islans
- The rescue of Emmerick
- Battle the Mad Beast
I think its lost to the old forum, but certainly one of the funniest moments was Hardrada's drawing of a battle with the Frost giants. The accompanied the Battle at Alesund and the seige of Dramman.
These are all excellent choices, so it's hard to narrow down to the final three. For your consideration in no particular order:
1) The Severing (and all the classic good vs. evil battles leading up to it) - Also, Harrick guzzling undead powder like a pixie stick was pretty entertaining.
2) The battle against The Devourer - We had him beat and he was curled up in a corner with 1 HP left when he managed to escape before the final blow.
3) Battle in the Beastlands - I don't remember all the details, but the party was ambushed in the Beastlands as we were traveling through there as a shortcut to somewhere else and we heard the echo crying out in the distance "attack!" and hundreds of beasts descended upon us. Ikraam and I think Vor'ruk were shoulder to shoulder fighting off these things and a moment from death before a gate opened to get us out of there.
4) Daane's Revisionist History - This is going back a long time and I can't remember the details, but I remember a young Malchia traveling with Daane and we encountered someone who was opposed to the Silversword's. Daane got into a heated argument over the history of some event between the two factions and DM had us "roll it out" to settle the argument. It was a friendly skirmish between Daane and this other person. I rolled a natural 20 for Daane and he defeated this person, thus "rewriting" history in his own way. Daane proceeded to write stories and poems over many years in game time to gloat about his victory. Not life altering stuff, but one of the more enjoyable running jokes on Habololy.
5) The Season 20 PC Tournament - This is memorable for all the wrong reasons and remains incomplete to this day. It did, however, lead to many important revisions in our rules, feats, skills, and play structure. I believe this also helped usher in the domain revision.
6) The Gnolls Great Feast - The litter of Gnolls had just killed a unicorn and a host of other creatures. When we had the last foe defeated and on the ground, we surrounded it in a circle and all eight of us consumed the creature in one synchronized bite attack that left viscera flying all over the forest floor. That's some pretty powerful imagery that comes to mind when I think of that moment.
7) Claude - Pretty much his entire existence has brought about some of the funniest and memorable events in the last two decades.