This guy saw the ad for the LG G Flex and decided their test wasn’t rigorous enough, so he took matters (and a knife) into his own hands. The result is impressive; though I was expecting him to put the knife clear through the phone, it did mostly recover from a scratch. Then he presses the whole thing flat (it is called a flex, right?) to no consequence.
Maybe these curved phones aren’t so bad. Check out the G Flex’s specs here.