Products are not always the most reliable when it comes to safety. Companies put together their products to make sure that they receive the most return on their investment. This means that they will occasionally sacrifice quality and use materials that can be harmful or even deadly to people when they use the products. Obviously, not all companies are like this, but you can assume that there are some items in your home that aren't exactly built from the safest materials.
Did you slip and fall while walking near the kitchen of a local restaurant? Maybe some grease was splattered on the ground or there was a problem with the tile.