Many vendors use what is called "dynamic keyword insertion" on AdWords. You gotta love it when it goes awry.
Here's an example:
Here's a link to their landing page. It's obviously TOY Brahman Cattle. But if you're a rancher, looking to find some Brahman cattle (which weigh, on average, 2000 lbs), free shipping is definitely going to be a Christmas bargain!
As for those of us who do AdWords, be careful with "Dynamic Keyword Insertion" as you could get some pretty weird clicks!
Here's another one. Did you know you can buy "Smelly cats" on Amazon?