Nah, I've just done what is known in technical terms as "Revved it so hard they blew the arse out of it." Also known as "Throwing a leg out of bed". They threw a connecting rod because they ran it too fast. Well, except the first one, in that case, the crankshaft broke.
Welding isn't necessary - I mean, you don't weld a piston to anything. They just exceeded what the materiel could bear.