Haywire is when you start spazzing out and go crazy and move your head in a terrible way making horrendous noises. Haywiring can even get people around you killed if they don't look away from you soon enough.
Baby's haywire KILLED ME ON SPOT - Local Dead guy
Springtrap's haywire is just horrifying
The state of a finished repair or construction project that has been engineered with ingenuity due to the parts or materials available, which also causes troublelater
I haywired the TV using a metal hanger and a pop can