Thanks for your teaching. In return the word you were seaching for at 3:00 was SPARK. You could say : If the capacitor is charge, it gonna spark when you will discharge it.
This was very Dangerous the insolator could have bee cracked easily with your screw driver if it is not Aluminum Oxide but beryllium the dust is not good for you breathe in or ingest
Bet he left that lot on the bench and walked off with his magnets, No wonder this country is in the state it's in ???????? Just look at the state of Africa