Sorry if this becomes a bit disturbing but I'm sure Bionicle has done worse!
I was rewatching Mask of Light a couple of days ago when I noticed something about Jaller's revival. Jalller is killed by Turahk and is left dead on the floor of the temple's entrance. Takanuva takes his mask with him as a good luck charm. Anyway in the end Takanuva uses Jaller's mask to "revive" Jaller and bring him back to life, a new body for Jaller is made using the mask as the base.
Doesn't this mean that there is a maskless dead Jaller still up on the surface? What would happend if Jaller were to see this?!