ok, i know that the stock gtr turbo's can let go from age, and or too much boost
i've heard that most of the time the thing ends up in the cat, but i've heard that it can also get sucked back and bash against the engine, and bits of metal end up rooting a couple of pistons.
some ppl believe this is impossible, but some ppl have actually had this happen, and i'm just wondering how often/ common this is