Synonyms for Go ballistic:

• n.

  •blow up (noun)
  • blow.
  •go crazy (noun)
  • crazy.

• v.

  •flip out (verb)
  • lose one's temper,
  • blow one's stack,
  • lose one's mind,
  • wig out,
  • hit the ceiling,
  • crack up.
  •freak out (verb)
  • go bananas,
  • flip one's lid,
  • lose one's cool,
  • work oneself up,
  • break down,
  • come unglued.
  •go crazy (verb)
  • go off.

• Other synonyms:

  •freak out
  • breaking down.
  •Other relevant words:
  • hit the roof,
  • blow up,
  • erupt,
  • blow a fuse,
  • throw a fit,
  • snap,
  • flip one's wig,
  • have kittens,
  • have a fit,
  • go through the roof.