After the start, a few minutes later, I did not understand what happened. I opened my eyes and saw the amount of 500 dollars written on the screen. When I looked closely, I found that I had bet on it and lost the bet for a trivial reason, which is that I made a mistake. When writing a number due to exhaustion and fatigue.
How if the result is different, you placed a bet by mistake (whatever the reason) and the crash is still running and the multiplier is already reaching few hundreds X and you noticed it and you make a really huge profit?
Such mistake may happen even if you are not tired, what you need to do is to always double check your bet but of course if you are tired then simply do not gamble with a lot of money.
By the way, you must be a rich man to say $20 as a very small bet amount especially you take it as a starting bet (I assume you use martingale) and finally you made the mistake by having a bet worth $500 and lost it.
Assuming you were doing martingale, your total lost must be something close to $1k.