People sometimes say that you eat eight spiders a year in your sleep. You also sometimes hear that you can get out of a traffic jam faster by zigzagging. Or what do you think of the statement that shaving only gives you more and thicker hair? People say a lot, but how do you know what's true? In 'They Say That' Dina and Andy find out the truth for you. They investigate all these and countless other claims and sayings.