pragma solidity ^0.4.18;

contract Testing {

  address public owner;

  function Testing() public {
    owner = msg.sender;
  }

  function() public payable {
  }

  function withdrawAll() public  {
    uint256 balance = address(this).balance;
    owner.transfer(balance);
  }

}

47s-Video: https://youtu.be/HpDUE3_NGBw

transact to Testing.withdrawAll errored: VM Exception while processing transaction: out of gas