@oz1lqo Not vintage but capacitor.
In my final days at a job I was working at my bench. One of the people being interviewed was being shown around and it was my station being shown.
Stopped testing and started chatting.
Then, BANG!
insulation all over the place. Core of capacitor shot from the board and hit my shoulder. Luckily missed my face. Not sure if the interviewee was impressed.
Electrolytic capacitors were fitting the wrong way around on the boards I was testing.