Remember that throwaway line from Monsters Inc. where Mike tells Sulley he's been "jealous of his good looks since the 4th grade?" Pixar tried to address it in Monsters University. But here's what ended up happening. Plus another deleted opening scene!
Here's a host of additional deleted scenes from the Monsters University DVD and Blu-ray.
And finally the clip from 4th grade where Mike and Sulley originally met is over at Entertainment Weekly.