it shouldn't explode into a million pieces. People do that on my starquestclub website all the time (starion/conquest).
What will probably happen, is, if its out of balance, it causes the shaft to wobble a little, and what will eventually happen, is, it will blow the internal oil seal out, causing a lot of smoke, and, you should shut it off pretty quick before all the oil is forced out through the seal. (if your engine oil is also the turbo's oil, anyway)
But...you would have to actually suck something into the turbo for it to explode.
98 Jeep Grand Cherokee 5.9 Limited / 96 Dodge Ram Indy Pace Truck / 87 Dodge Charger GLHS / 85 Dodge Omni GLH