Shoot from the hip.
Sing from the same hymn sheet
Shoot from the hip.
Pope of the Dictionary.com Forum
Catch lightning in a bottle
Sharp as a tack
Pope of the Dictionary.com Forum
Storm in a teacup
Bumps in the road.
About as useful as a chocolate teapot.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
How about:
The tail is wagging the dog.
As useful as tits on a boar.
Pope of the Dictionary.com Forum