Twitter users, there's a new worm going around. Beware of bad Goo.gl links (like the one pictured above). It spreads when you click on the these links, so don't click if you see a Goo.gl link in a tweet all by itself.
Like an idiot, I clicked one of these links and the URL started changing over and over again. It didn't take long to realise this was a bad link. If you do click one of these accidentally and the URL starts to change rapidly, quickly close your browser window. That seems to have kept me out of trouble.