Being quick-witted, personable, and likeable is essential for a host, as well as being able to make quick transitions from one product to another. Additionally, with networks like HSN and QVC routinely debuting brand new inventions and products, the host must also quickly articulate to the audience why the item is worth purchasing. All the national American home shopping channels are broadcast live, 24 hours a day, so mistakes and errors cannot be edited out. This has led to some memorable on-air home shopping bloopers, such as a QVC demonstrator falling from a ladder and getting injured, or a Shop at Home host insisting that a moth in a photograph is actually a horse. Many of the guests who accompany the home shopping host on-air are not particularly TV-savvy or experienced, so the host must help guests better define the attributes and value of the items being showcased. Because of the large influx of guests and products, hosts often lack the time to study the product beforehand, which increases the need for an effective host to possess sufficient verbal skills to mask this lack of direct product knowledge.