Yup, that looks pretty bad, and it's exactly what I thought it was.
Sounds like you may have had a Squib Load with the next round blowing it up. 
Primer, no Powder, driving the Bullet down the Barrel just enough to allow the next round to chamber, leading to catastrophic failure.
First round that started the fiasco: sounded like a completely dead primer; immediate action drill: rack the slide to clear malfunction, everything went into battery normally, pulled trigger again;
And that is where, things went totally wrong! Unless you are in the fight of your life,
STOP and investigate when a round fails to function the Pistol properly.
Tactical training did
NOT apply here.
At a minimum, the barrel will be trash, with possible damage to the frame and other bits.
IF the Slidestop Pin is intact, it may be possible to drive it out with a Punch.
You may, or may not, then be able to remove the Slide Assembly, but what you then see, won't be pretty!
In my opinion, you probably just would be better off just buying another B6, and writing this one off.