While digging around in my pics folder today I came across this pic of my friend Allen Moore's turbo 2.3 Pinto downpipe after the turbine wheel broke off of the shaft (turbo had been in several high boost racecars over the years). As you can see it left a really neat pattern in the downpipe, but you can imagine what the turbine housing looked like after giving birth to the wheel
Also goes to show you just how hot exhaust piping gets in a turbo car because the downpipe didn't tear, it just bent right out of the way.