3188 Nunu damage

This was not death recap bug,because i saw 3188 damage being done to me

https://imgur.com/a/9s2vF#ekGJoMv

Nunu had 258 ability power.

https://www.youtube.com/watch?v=Io5Lt30HYaQ&feature=youtu.be

Casting time was less than one second as you can see on the timer ingame.

He would have 1 shot Galio as well,but Galio used Shield of Durand