Ok thanks... so you're saying you can't lose more gas than you specify? I had a feeling they just multiplied the amount of gas you set with the amount of time that elapses...
I mean, how else are people losing 0.65 eth in transaction fees...
It looks like that guy wanted to buy tokens on ICO and decided to pay a high price for gas to increase the priority of his transaction, wanting to receive his tokens first. But the gas price was too high, 25000 gwei per gas so commission just eat all his transaction. And by the way, he lost only 0.1 Eth, 0.65 Eth - full price of the commission, if there was enough money. Anyway, 25000 gas limit is not enough for a smart contract, more likely 250000, so this transaction had no chance.
mate was right this is not a normal transaction thats why the fee becomes that high..maybe its his choice to allow the transaction take the gas price just to cope up with his demand.so for the OP you dont have to be afraid because this is isolated cases.this is not happening everytime