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The easiest way to get the actual picture from a captcha, especially if you're including any sort of witty commentary in the input box below, is to get a screenshot by pressing the PrintScreen/SysRq key on your keyboard. It's usually up towards the top on the right-hand side :3 Pressing it will take an image of everything up on your computer screen at the moment.
Then you can open any paint program on your computer (MS paint will do) and press Ctrl+V to paste the screenshot in, and then select the portion of the image you want (The captcha) and delete everything else. Once it's cropped down to size, save it to your computer, upload it, get the URL, put it in the IMG brackets, and you're good to go ;3
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