Its so nuts how many times I have seen someone drive onto I-85 or I-77 with a sofa or some other type of furniture on top of their car holding it by hand. A little rope goes a long way! I witnessed a large wreck in LA once when a refrigerator held to the roof of a car only by string came loose and was hit by 3 passenger cars and a 18 wheeler. A little common sense goes a long way!