I worked in the funeral industry here in Pittsburgh for a bit.
I heard lots of stories like this. One involved a family who elected for cremation of their loved one, but still wanted a casket in church (happens all the time). The deceased is placed in a cardboard cremation casket that goes inside a decorative casket with a door on the end that allows for the removal of the body from the casket without having to lift it out.
The church had very steep steps to the top (Pittsburgh, after all). During the climb there was no problem, but on the decent the end door swung open because someone forgot to latch it. The box slid out, opened up, and deceased ended up lying on the sidewalk in front of the church.
The veterans told me so many stories like this. Funeral industry can be pretty hilarious when you’re not the family of a screw up.