[Professor S]

Once again, its likely that nothing bad will happen, but science has gained more from accident than intention. There is a line that separates confidence and arrogance, and to completely disregard the chance of something bad happening from operations that have never been attempted, crosses that line.

I'm not saying "don't do it". I'm saying "be careful".

And the I'm Doomed part was in jest, obviously, but there is room for reasoned concern.