What happened to this case?

[DadSmith]

I polished a bunch of once fired brass and was sorting through them and ran across this one.
What do you think caused this?

9mm

 

[Gaffer]

Hit by a lawnmower? I probably wouldn't use that one! It did clean up nicely though.

 

[Michigan Slim]

Mower is a good bet as Gaffer said.

 

[76Too]

Typical Glock brass.

 

[DadSmith]

I tossed it into the bad brass container.
I don't think I've seen one this messed up in awhile.
Out of 15lbs it's so far the only bad one.

 

[shibumiseeker]

Careful biting the bullets when performing an amputation…

 

[Leo]

Stove pipe jam in the pistol.

 

[red_zr24x4]

Typical Glock brass.

But,but, it not all explody looking

 

[Ruger_Ronin]