Indeed, I've already had one:every trader gets a "near death experience" and he just "hopes" that they had experienced that before he hired them.
This occurred over 20 years ago when I was trading options in a Brown & Company account (remember them ?).
After one huge long option bet that went well (+$10,000), I got tired of losing in my subsequent long options positions. So I said to myself, "why not go short premium ?".
That's exactly what I did with 3 NDX put options at-the-money.
The Nasdaq was sinking at the time and I put on the trade on a Friday. By Monday afternoon, the trade was up $2000 as the Nasdaq rallied from an oversold condition !
Stupid me (I was a novice at the time) said to myself "No way am I bailing out of this position...I'm holding it till the premium is zero".
What a dumb idea that turned out to be. Then I got a call from a Brown & Company broker who said I needed more capital to cover the margin requirements of a naked option sell position. He also congratulated me on the current trade.
I was too stupid to know at that time that I should have entered the trade as a credit spread...thus avoiding the huge margin requirement.
What happened next is nearly prophetic: over the next 10 days, the Nasdaq started to go back down. Within a week, my profits vanished. Over the subsequent week, I was starting to lose....and then one Friday, the market swooned and I was down $2000. At 3 pm I closed the position fearing that the put options would be valued at open on Monday at an exhorbitant price. I was right. On Monday, the options opened at 60...and if I had held, Brown would have gotten me out at that price....an $18,000 loss !!!
Funny thing: Brown never really enforced that margin call. In retrospect, I wish they had.
That's my story boys...true as it is.