Shocking video shows Noma's celebrity chef viciously humiliating staff in his kitchen -- as a wave of ex-workers hurl abuse allegations at the world's best restaurant ahead of its Los Angeles pop-up.

The head chef of the world's most prestigious restaurant has issued a grovelling apology after dozens of former employees accused him of physical, verbal and psychological abuse -- just days before the opening of his highly anticipated $1,500-per-person pop-up in Los Angeles.