Using fast confocal microscopy, it is now possible to study the flow of concentrated colloidal suspension at the single particle level. In this talk, I will briefly review this methodology, and present results obtained in two simple flow geometries: shearing between parallel plates, and pipe flow in a square capillary. Both flows display features that cannot be understood under a traditional rheology paradigm. Instead, the flows exhibit features reminiscent of granular materials. Indeed, in the case of capillary flow, a stress fluctuation model borrowed from granular materials can be used to understand our observations in considerable detail.