It's known that Bungled Bolt will NOT deal the caster damage if it is blocked, because a Block will negate all effects after that point. I'm guessing there's a difference between how Bungled Bolt has a target and Berzerk Spin does not, because this happened: BATTLE LOG: Player=Gary,Scenario=Gnome Vault,Room=GNOM (Sir Knight),RoomID=57707,Event=PlayAction,Action=Berzerk Spin,Instigator=Jollo,Targets= BATTLE LOG: Player=Gary,Scenario=Gnome Vault,Room=GNOM (Sir Knight),RoomID=57707,Event=TriggerSucceed,Trigger=Surging Shield Block,TriggeringActor=Thessord,AffectedActors=Thessord,TriggerType=Action,TriggerLocation=Hand BATTLE LOG: Scenario=Gnome Vault,Room=GNOM (Sir Knight),RoomID=57707,Msg=Thessord, health = 14 (pi:0, gi:1, ai:0) blocks Berzerk Spin BATTLE LOG: Scenario=Gnome Vault,Room=GNOM (Sir Knight),RoomID=57707,Group=Thessord,Event=Discard,Card=Surging Shield Block BATTLE LOG: Scenario=Gnome Vault,Room=GNOM (Sir Knight),RoomID=57707,Msg=Jollo took 1 damage So is this how it's supposed to work? Thanks to the Block, no one on my team gets damaged, but the Gnome has to live with the consequences?
I expect it was implemented that way because, like you say, Bungled Bolt can only ever target a single individual so the card is either blocked or it is not. Berzerk Spin could hit multiple characters and have only some of them block so I'm guessing that they decided not to distinguish the 'everyone blocks' and the 'no-one/some characters block' cases. If you really wanted you could also make the argument from the text on the card that Berzerk Spin is affecting all the squares adjacent to the character playing it, including the empty squares which cannot block. So, I suspect that it is intentional but I can see you point that it could be considered inconsistent.
I think its similar to this, http://forums.cardhunter.com/threads/berzerk-spin-vs-acrobatic-flip.1930/#post-21589 which means that the process has yet to be defined.