The first page of Professor Akiyoshi Kitaoka's website says: "This page contains some works of 'anomalous motion illusion', which might make sensitive observers dizzy or sick. Should you feel dizzy, you had better leave this page immediately." Great! Not every site is lucky enough to have such a dramatic opening. Akiyoshi's work in the Ritsumeikan University Department of Psychology plays with optical illusions of movement and color and does actually cause a bit of nausea.