Please have a look at this YouTube clip. It is only 48 seconds. I'm interested to hear if you get the same advert popping up along the bottom of the frame and whether it makes you laugh as much as it did me.
The ad that Woolwell and I saw is for dental implants.
Having revealed that I'll move on to the point of the thread which is to ask is contextual advertising so dumb it is annoying or so clever because I now know the name of a firm doing dental implants and I would have never remembered it if it hadn't made me laugh?