[SMALL] [WARLOCK] Soulburn: Demonic Circle as Destruction/Demonology

Recently discovered this while running ICC, the Demonic Circle speed buff stayed after I changed my spec back to Destro after playing around with Soulburn.
Unsure if this has been posted before as I haven't seen it but;

1. Be in Affliction specialization
2. Use Soulburn
3. Swap specializations while Soulburn is still active
4. You now get the speed buff everytime you use Demonic Circle

The buff will persist through portals, teleports, reloads, relogs and being offline for a very long time.
I haven't tested this in arenas or skirmishes y