That moment when you have all of your bitcoins in one vanity address, you import that address into a wallet and spend like .1 bitcoins.
Then the next time you go on blockchain.info to check your "balance" you see it is all gone.
Your bitcoins were moved to a new address after spending (fortunately still in your wallet).
Wasn't there a story of someone who imported his paper wallet, spend some money and than deleted his wallet, thinking the rest of the BTC would still be on that paper wallet?
Oh man, I remember that story. I can't find it though so it might not have been on this forum but it was pretty unfortunate