Neon Genesis Evangelion S01 E10 Magma Diver

"Mankind's greatest fear is mankind itself."

The EVA pilots are disappointed to find out that they are not allowed to go on their class trip to Okinawa, because they have to stay at Tokyo-3 to stay on-call in case of an Angel attack. Meanwhile, a new Angel is discovered in a chrysalis-like developmental stage deep within the magma of the volcano Mount Asama.