This is a page of with a bunch of optical illusions. I’ve blogged a bunch of optical illusions before, including many of the ones on this page. However, I couldn’t resist posting this when I saw, down towards the bottom of the page, a button with the text “Warning: Do not click on this button if you are subject to seizures”.
I clicked the button and haven’t had a seizure yet, but maybe you’ll be lucky and it will trigger a fit for you. 🙂