My understanding of what happened to Brandon Lee is that the casing of the blank fractured and a piece of metal shrapnel flew out and hit him in the liver. I do find that believable as I've seen it myself, I was picking up my brass for reloading and one of my spent casings had a big piece of metal missing from the case mouth like it had broken off during firing and got sent down the barrel after the bullet. I've seen others that had cracked down the side, sometimes jagged split sometimes looking like someone cut it with scissors.

My understanding of what happened to Brandon Lee is that the casing of the blank fractured and a piece of metal shrapnel flew out and hit him in the liver. I do find that believing as I've seen it myself, I was picking up my brass for reloading and one of my spent casings had a big piece of metal missing from the case mouth like it had broken off during firing and got sent down the barrel after the bullet.