Guild Wars 2

When fighting the Claw of Jormag, Downed Skill #4 is never interrupted by the passive ice field. I’m not even sure if it affects Downed characters at all.

What this means/what the exploit entails:
If you are Downed in a location that keeps you from being targeted by mooks or affected by the Claw’s more active attacks, you can stay Downed forever at no risk, by using Skill #4 to almost get up, and then spam your other Downed skills (perhaps to chip away at the ice shield, as I did when I discovered this exploit) until the need to heal arises once more (or the ice shield is downed and the Claw stunned).
Users of this exploit are exempt from the most difficult parts of the fight as a result of their position and state (you can’t Fear a downed character, can you?).

Places that have been demonstrated as effective locations for this exploit: on the Claw of Jormag’s side of the ice wall in Phase 1, and beneath the Claw of Jormag’s torso in Phase 2. Basically, near the Claw himself.