There's an error in his first 'Function Invocation' example, the answer is 500, not 501. [Reason: 'this.value++;' in the method invocation refers to obj.value,

There's an error in his first 'Function Invocation' example, the answer is 500, not 501. [Reason: 'this.value++;' in the method invocation refers to obj.value, since 'this' is bound to 'obj'. Only in the innerFunction function invocation does 'this' bind to the global object.]