Basic electronics theory (response to Layman's issues)

I had a friend when I was studying who, during a fault finding class put a standard red LED in a mains socket and turned it on. There was an explosion accompanied by a blinding flash of red light, and they managed to blow three levels of fuses - Room, floor, and building.
Wow, I'm amazed that:
1) the LED carried enough current for long enough to blow the panel fuse
2) the panel and floor fuses carried enough current for long enough to allow the facility fuse to blow.

Usually power systems are designed to prevent 2) - but of course nothing is proof against a stupid enough user.
 
Wow, I'm amazed that:
1) the LED carried enough current for long enough to blow the panel fuse
2) the panel and floor fuses carried enough current for long enough to allow the facility fuse to blow.

Usually power systems are designed to prevent 2) - but of course nothing is proof against a stupid enough user.

I think everyone was amazed that it did such a 'good' job. :)
 
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