hadn't found similar posts and posted here:
as you know on heroic zonozz on shadow phase there are different types of mobs
one of them : x8 Eyes of Go'rath
each 3 seconds they instantly cast "Shadow Gaze" on a random player inflicting 30k shadow damage each (240k total if they are all alive)
we hadn't seen any cast animation but we understood such thing:
they have two animation phases
1)
2)
so while eye of go'rath is sitting - you can cast interrupt abilities and despite of the fact that it has no spell cast and spell cast animation - cast will be kicked => less damage to raid members