Much concern is paid to the hazards posed by people using mobile phones while operating motor vehicles. Although using a smartphone or other mobile phone behind the wheel of a car is most certainly dangerous, research is showing that very frequent usage of the phones is harmful more generally. A study has found that individuals with relatively high levels of mobile phone usage are more likely to demonstrate cognitive failures, which can range from forgetting appointments to accidentally bumping into things in the environment. Cognitive failures are associated with the short attention spans also observed in high-frequency mobile phone users. Clearly, if people want to reduce their risk of cognitive failures, they should limit the amount of time they spend on their mobile phones.