Post your worst 'double up to get even' fiascos

[KSOT]

Please share them with me, if you were ever dumb enough to attempt it. It'll make me feel a lot better.

I know the whole Martingale thing is a high risk sham but I kept pulling it off when I was stuck big in online blackjack. I even had numerous trips to the casino where I'd have a bad night of poker and make it all back with a few spins on the roulette wheel. So basically I got way too confident, foolishly carried more money than I was willing to lose, went on blackjack tilt and failed to double up like 5 times in a row. Net loss - $600. Not much to most of you I'm sure, but it was quite substantial for me. More than I've ever won or loss at any casino in a night.

Did you learn your lesson after you saw Martingale's strategy crumble before your eyes? I hope I do.