Uncanny damage mitigation

I tried posting in "reports", but it wouldn't work.

I've killed this SM Sstoneheart before, and it never came off to me as him using anything illegitimate. Today, though, I caught him and his group and I charged him. What ensued afterwards made me scratch my head. As you can see, he doesn't receive any healing or use any healing potions, there are no damage absorption buffs, and yet his health stayed stationary for a long while before finally going down, after I did a total of 17,640 damage to him. This is with him not using any damage mitigation buffs, no pots, nothing. I couldn't believe how much he tanked. I just want to know if there is something that I'm missing here.











Direct links added in-case of embedding not working:

http://img39.imageshack.us/img39/3527/aion0386t.jpg
http://img84.imageshack.us/img84/646/aion0387e.jpg
http://img543.imageshack.us/img543/9321/aion0389o.jpg

 

was this before the server restart?

 

Yes, about 15-20 minutes before.

 

maybe it was the terrible delay....

 

Most likely the server lag that caused us to reboot the realm.