My neighbour's snowmobile, an 800cc two-stroke with a carb, recently had a new head and forged pistons installed, and the cylinders ported. This thing had ridiculously high compression, to the point that it was virtually impossible to pull over.
Well after the break-in period, it stopped dead on a lake. A piece was gone out of the piston, out of the edge so it was no longer round. I'm thinking it was filled with the wrong fuel, i.e too low of an octane, and the thing detonated. What do you guys think?