A mate of mine was a stand in teacher at a secondary school, don't know which lesson he was supervising. During the session, a young girl for some reason only known to her stuck a file into the overhead lighting sockety thing which didn't have a bulb on it .
After the bang, it all went dark .
Just made me remember . In 1980/81 AAC Harrogate . Doing some mind blowing theory we never used , class A , B , C amplifiers . WTF . R. Sigs never thought about silicon transistors? . Anyway one AT tech thought ? What would happen if I put the ends of this compass (drawing tool) into the neg and pos sockets on the socket in front of me and turn it on ?
Well a Big Bang , power lost and you will be going to Catterick to train as a driver.