A man who was killed when a cannon exploded at a baby shower was within 15 feet of the device, say police.
Evan Thomas Silva, 26, was hit by shrapnel in Saturday night's blast in the US state of Michigan.
Four or five people were in the backyard when the cannon was fired to celebrate the baby's impending birth.
Flying metal also hit the garage and parked cars, but Mr Silva was the only person hit and died in hospital.
The owner of the home - in Gaines Township 55 miles northwest of Detroit - said he had bought the antique cannon at auction and had fired it several times before.
The device was similar to a signal cannon, a miniature replica usually kept as a novelty.
"The cannon is designed to create a big flash, a loud noise and create smoke," said state police.
"The cannon did not contain any projectiles, but it is suspected that the gun powder loaded into the device caused the cannon to fracture, resulting in shrapnel being spread in the area."
County prosecutor David Leyton told local news station abc12: "So after the explosion - that was extremely loud apparently - they heard some screaming.
"They ran over to the individual who was lying on the ground. It was clear that he had a fresh wound to his chest."
There have been several serious accidents in past few years as people try to host elaborate baby-themed events.
A wildfire burned thousands of acres in September after a California couple's plan to reveal their baby's gender with blue or pink smoke went drastically wrong.
A 56-year old woman also died in 2019 in Knoxville, Iowa, when a device meant to spray coloured powder exploded like a pipe bomb.
Prosecutors are investigating the latest case to see if any criminal charges should be brought.