^I think the 3 seconds rule works with TVtropes. As soon as you realize on what site you are, you can try to close the page and if you do so within 3 seconds, you won't get stock. Well I did test it throng fully, because of the obvious risk involved, but I know it has worked at least three times for me so I guess it's a plausible hypothesis. Good for you for managing to get out withing 10 minutes though. You most have a pretty good defense mechanism.