User blog comment:Xilinoc/Ch. 555 - THE HERO/@comment-9096222-20131102093649/@comment-11051098-20131103094114

I thought that box was on the ground, but I see now that it's in the sky.

Either way, the black thingy shattering and Akon's comments, suggests that's the Garganta being opened from the SS and Ichigo coming through. And since Shaz was by the hole in that box, close to them, I think Ichigo is the one who wounded or killed him. Likely killed, I think, since haven't seen Shaz again.

Also, when we see Ichigo after he came out, he was surrounded by something white. And the pointy thing that came towards Shaz' head, could have been an indication of movement, not necessarily the point of a weapon itself.