Mounted while casting in a BG. Hack?

[SatanIncarnate]

Name of violator: Damagshama (Horde)

Realm: Fun realm

Proof: http://prntscr.com/dkf2tn

[danilolxd]

Isn't hack, Bug visual

[Weegee]

Declined.

 

It is only a visual bug,

 

Check his buffs, you don't see the mount buff.