When people observe the actions of others they do not always see the same thing. Understanding why this happens requires an understanding of the features important for recognising actions as well as the individual differences that exist in the neural processing of human actions. In the first part of my talk I’ll discuss results of psychophysical experiments on human movement perception that reveal physical features important for recognising actions and properties of the actors. In the second part of my talk I’ll discuss fMRI data that reveals group differences in neural processing of human actions. This will include perception of biological motion in autism, as well as differences due to extensive experience in dance, drumming and CCTV observation.