I work as an RD in a psychiatric hospital and most of our clients are schizophrenic....and his behavior sounds similar.
Unless he's willing to go to a Dr., the only way to get him help is if he threatens to hurt himself or someone else.
Do you know any of his family or close friends?
" the only way to get him help is if he threatens to hurt himself or someone else. "
He did bang a kid over the head during lunchtime last year . But Japanese teachers are always hitting kids ...