Enter Halls of Torment (Story questline), taking Lyris.
Lyris stands around doing nothing while you fight.
Eventually you get to "Doppleganger" Lyris.
This Lyris LOOKS LIKE she's standing around doing nothing (very convincing copy of my Lyris), but you'll notice your health bar going down.
No combat, no movement, no audio, just death.
The only cure for this kind of frustration is F4.
The best things in life make you sweaty.
-Poe