Terminator 3 Arnold Schwarzenegger Head Knocker NECA presents the Arnold Schwarzenegger Terminator “Head Knocker” (Bobble Head.) Standing 8 inches tall, this piece is hand painted and made of heavy ceramic-type resin. Comes in display window box. John Connor is now 18, and a female terminator, called T-X or Terminatrix, is after him . Another T-800 is sent back through time to protect John once again on the verge of the rise of the machines. NECA presents the Arnold Schwarzenegg..