I had a Northern Rock account and got the free shares, when they floated. Quite nice, I thought, getting 3 cheques a year for £30 - £40. The price of the shares rose steadily, along with what they paid out.
At some point, I was offered a half price deal and bought £5,000 worth. They still kept climbing in value and I was working in Sardinia, when I saw that the were over £12 and I decided to sell them; it would have made me £8 per share.
I got off the plane home and saw that they'd gone bust.
On the sunglasses theme, I had a pair of second hand Ray Bans, £40 in the early 90s. I was a skint student. I was on the Metro and it did an emergency stop, throwing an old couple out of their seats. His arm was evidently broken and her scalp was lacerated all round one side of her head.
I went to help and a nurse told me what to do. After the ambulance had come for them, I went back to my seat and they'd gone from the top of my bag.