Mmmm...Ranger IPA. Good stuff.
Did you have the thermometer in the kettle the entire time? I only keep the thermometer in the kettle during steeping. Otherwise, I never have it in the kettle until I'm doing my ice bath (and I don't leave it in the kettle, I just check the temp and then set it aside).
If it was one of the mercury ones, I'd probably toss the batch, sad to say. Mercury is poisonous (obviously). Haven't had experience with this myself, but that's what I'd do. As far as glass goes, if you strained really well you might be okay. Put the pieces together that you recovered and see if there are any shards missing or if it was a clean break. Either way, I'd probably toss the batch.
Sorry that happened, man. :/