Talk:Nunu/@comment-174.57.25.48-20110113052912

If Nunu is silenced, stunned, killed, or knocked-up (that sounds odd...) the ult will cancel with no damage (the ability will still go into cooldown).

Pushing him away via Janna ult, Aniv wall, or Trundle wall will reset the channel timer iirc.

In ranked, it'll basically never fire since people will counter it easily.