This single still is from the widescreen version of ?World Record?, one of the Animatrix animated shorts. It has been considerably scaled back from the original material.
The Animatrix short film is set inside the virtual reality world that is the Matrix, inside an Olympic stadium, with a crowd of tens of thousands of avatars and AIs watching. This is glorious fiction at this point in time, and serves as a reminder of just how far we have yet to travel, for serious collaborative uses of VR. Only when scenes such as the one pictured above are replicable in terms of avatar participation density, will we truly see the business and social potential for VR, realised.
Link: Animatrix: World Record