A DigitalPoint Forums thread reports that a search on (beware before you click) [cricket talks] in Google Image search returns a pornographic image. It happens both on standard safe search and strict safe search, but goes away completely when you turn off the safe search feature.
Here is a picture, which I cropped a bit to show the result here:
I personally see the image on the 3rd row when strict search is on and the second row when safe search is in standard or moderate mode.
What is interesting is that it is hosted on a pretty bad domain, i.e. asianteenmovieslesbiananal.info. OpenDNS for me blocks the domain due to the domain and network containing pornography and nudity. I guess Google got mixed up with this one.
On a related note, a Google News Help thread reports that Google News had an image of a PlayBoy teaser on their most viewed section. I personally did not see it, but it would not have been the first time seductive or nude images showed up on the front page of Google News.