I just had to post this because SE really wants healers to DPS.
To the point where when I play WHM healing is a secondary thought on my mine.
Ya ya I cast regen and medica II at the start of most trash pulls then spam DPS and all mobs die before regen and medica II are off or before I need to spend any more mana on curing.
but here ya go.
When the healer thinks they're DPS