impaction due to substrate ingestion...fact or fiction?

[rwg]

I am pretty careful to avoid substrate ingestion with my snakes as much as possible to avoid impaction. That said, I've asked around to some long-time herpers, and quite frankly I have not heard ANY first-hand accounts of death due to impaction caused by substrate ingestion confirmed by post-mortem autopsy.

I'm not saying it doesn't happen or cant happen, and no matter what happens in this thread, I will always take steps to reduce ingestion of substrate in my collection, but what I want to know is:

1) who has personally lost a snake to impaction caused by substrate ingestion?

2) what was the snake's species and age?

3) what kind of substrate was it?

4) How and by whom was the cause of death determined?

5) Roughly how many snakes have died in your care (for comparison)?

Any information would be greatly appreciated.

other Roy