Guild Wars 2

There are a couple events that I played during the Beta weekends and that are listed on the wiki that I haven’t seen occurring since the game’s release. The events I’m wondering about are in Giant’s Passage of Kessex Hills. One event is “Use explosives stolen by ettins to collapse their caves” and the other is “Defeat the brutish ettin chieftain.” What happened to these events? Were they removed from the game, or are they still available? If they’re still available, how do they get started please? Thank you.

http://wiki.guildwars2.com/wiki/Use_explosives_stolen_by_ettins_to_collapse_their_caves and http://wiki.guildwars2.com/wiki/Defeat_the_brutish_ettin_chieftain

I remember I did both after release so the do exist. The chieftan one starts (according to the wiki) by talking to Engineer Baldwin. The other trigger is unknown to me, but I’ve done it twice, and seen it active 3-4 times more.

Anybody else have any info on this?