Ever had one of these days?
Are you a human being?
We apologize for the confusion, but we can't quite tell if you're a person or a script.
Please don't take this personally.
Bots and scripts can be remarkably lifelike these days!
Enter the CAPTCHA displayed below, and we'll be out of your way.
If you're a Stack Overflow user, you have lots of soul-searching to do. Sometimes these requests can tell you what you already knew.

(Courtesy of Dave Webb)
Other times, they might be uncomfortably accurate:

(Courtesy of Lara Eagle)
If you get a particularly great ReCAPTCHA, send it our way. (But the bar is high -- it needs to be as good as these two, at least.) Consider it our punishment for being human.