By ANDREW ROBISON The Tower Spring is in the air, but inside Bobby Latona’s classroom on the campus of Manteca High School, there’s a very distinct Christmas feel. Check that: A very distinct The Nightmare Before Christmas feel. In his first year on campus, Latona, a teacher whose artistic sense has been influenced by his world travels, has introduced his students to street art, ceramics and now the world of stop-motion animation, using clay figurines.