What could happen if the reCAPTCHA service is not available?

Hi,Does anyone know what could happen if reCAPTCHA service is not available? Would the reCAPTCHA widget simply just not showing up in our form? Would it also prevent users form submitting the form, as we are not able to get a reply from the POST request for verifying the user input for the reCAPTCHA widget?ThanksSusan -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.