By Kelly Schremph, Hollywood.com Staff

Making a career out of frightening little children at night is no easy feat. In fact, it's something that takes an extensive amount of training — including going to college. Just ask Mike and Sully. The lovable Monsters Inc. creatures are roaring back onto the silver screen in this terrifying adorable teaser trailers for Monster University.

The brief clips (via Disney, Huffington Post, iTunes, and Yahoo! Movies) give audiences an idea of what life was like for our ferocious friends before they became so scary and features Sully (John Goodman) pranking Mike (Billy Crystal) in what appears to be none other than their college dormitory. It must be Thirsty Thursday! At least Mike seems to be having a ball....

Check out the four different versions of the trailer below and decide which cut you like the best:

Monsters University hits films June 21, 2013.

[Photo credit: Disney]

Monsters University Trailer

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