I know that I am a little late chiming in on this thread, but I just noticed this today. I too have smashed a finger twice in the last several years and chose to grab my dremal with the windshield bit. It was not easy using it with one hand but I did not trust anyone else to know when to stop, since I for sure would be the first to know when it dropped through.
But it sure did work well, and if it ever happens again I will not hesitate to use it again. I do however recommend a new sanitized drill bit