I saw a sign on the back of a car - "little liver on board". It took me a few moments to realise that the sign was in the shape of a red t-shirt and that, in fact, it was probably a reference to Liverpool football team.
But for a second I thought it mean't - "Please don't run into the back of my car as I have a small child but if you have to please don't pour brandy down his throat in an attempt to revive him for fear of health complications in later life."