Tinnitus
Always used to be more of an event on a prop when it became very obvious when the engine had stopped for all to see. Once had a pipe and coolant drop out the bottom of the engine on a DC6 (circa 1965) which I alerted the stewardess to who said she would "tell the captain" who appeared at our seat muttered about coolant and returned to cockpit said engine then wind milled to a stop !! No fire and rescue on arrival but this was not uncommon back then, and also we did have 3 other ones running sweetly.
Regards
Mr Mac