Hi, I get an error that can be reproduced with the following snippet: ``` javascript var poly = new Phaser.Polygon([ new Phaser.Point(250, 0), new Phaser.Point(50, 0), new Phaser.Point(0, 100), new Phaser.Point(275, 100), new Phaser.Point(250, 0) ]); poly.contains(50, 50); ``` The error stack is; ``` Uncaught TypeError: Cannot read property 'y' of undefined phaser.js:15457 Phaser.Polygon.contains phaser.js:15457 ``` Thats Polygon.js line 100