Stun or not ?

Hello :) As I am using the HargKyth's Infused Hammer , I have realized that sometimes the mob seems to be "stun" by my normal attack . A white circle appeared over their head and they just stand there for me to kill . Is it a effect of the hammer ? Can anyone explain ?
This is what I mean
Attachment 16256
He got stun , I think .

This is in fact a stun :vsmile: There is an update coming soon that will relay this information about Relic Weapons in the appropriate places.

infused hammer... whaaaaaaat? can u post a pic lol i want to have a look ;)

Edit: nvm saw the pics in another post