<p>TMZ has learned Mel Gibson exploded in anger last night on a college campus after an expert on Mayan culture accussed him of racially stereotyping the Mayans in the movie "Apocalypto."</p>
<p>It happened last night at Cal State University at Northridge in the San Fernando Valley. Gibson was speaking to a film class about his movies, and several members of the Mayan community came to hear the famous director.</p>
