I had that happen once with an HEI distributor in a dirt car...

It happened a little differently as the distributor locked up somehow on the shaft itself at about 6500 rpm...

3/4 of the way down the straight it went bang...boom....bang...pop...

Tore all of the wires in half where they went around the back of the heads and wrapped them around the distributor... realcrazy


...FAFO...