After reading through mozilla docs I found this:
In the global execution context (outside of any function), this refers to the global object, whether in strict mode or not.
After playing with scopes for a little I found that in node.js REPL...
> this === global
true
but when I create a script with the same line...
$ cat > script.js
console.log(this === global)
$ node script.js
false
Is there a reason for this? Or is it a bug?