I don't remember how long ago it was, but in RCJI (I think it was that mag) there was a report of some bonehead to stuck his hand over the front of an airstart turbine and sucked his finger into it and chewed it up, it showed bits of cooked finger on the compressor wheel and through the turbine.

Can't say I've had anything get sucked into an engine outside of typical FOD that you get from typical running.