Similar experiece
I did something similar with a manky old Oscilloscope years ago. Think it was a Hameg thing. It'd come back from site abroad where it was run on 120V and never returned to 240 back in our labs and when I plugged it in it went pop. I was never allowed to forget this but the bastard I worked for did the same thing about a year later. Obviously I couldn't say a thing but it became one of those elephants. Great fun..not.