I wouldn't be surprised to see you go off half cocked and blow us all up.
They say I have too many theories—go off half cocked and all that sort of thing.
Hence "to go off half cocked" originally meant that the burning fuse dropped into the powder pan before it was wanted.
My friend's gun is half cocked in readiness, and presented through an aperture in our hut.
: a half-cocked start
Prematurely; unprepared: not going into this half-cocked (1940s+)