 Try to imagine, as vividly as you can, being attacked by a rabid dog, foaming at the mouth, snapping at your feet right there under your desk. The resulting mental imagery is an important form of mental imagery and also an important form of emotional state. More generally, imagery dramatically affects emotions – it seems for instance difficult to make sense of what goes on in the mind of a fearful or angry person without appealing to imagery. On the other hand, the impact of emotions on imagery is equally significant – the imagery that occupies our minds is very often under the control of our dominant emotion, which sometimes alters its fabric and our capacity to control it. In other words, there is a two-way interaction between emotions and mental imagery (see Holmes and Matthews 2010 for a summary).