the 3 second rule.

[Parishna]

Or this particular shaman has run heroics with a warrior exlusivly. and is used to having everything run over and have their way with his face if he heals too much too soon....

[Nevrosion]

just a slight bump. had exacly the same experience with a shaman healer in heroic BF. didnt recieve any heals at the pull. then he started casting heals when I was around 50% hp and then it was usually too late.