Modeled in Blender, following the tutorial. (I found it funnier if he looked surprised and dropped his peanuts at the sight of a mouse.) Due to processing power required, I couldn't render with 50000 hairs as recommended; I needed to drop that to 10000, but I believe the effect is still pretty solid. This was shaded, lit, and rendered in Pixar's Renderman with 256 samples using the VCM integrator (PathTracer would have been faster, but the global illumination wouldn't have been as brilliant). 10 hours render time.