Do people sometimes eat more than the serving-size data on label at one time?

Yes, people sometimes eat more than the serving-size data on a label at one time. This is known as over-eating or binge eating. It can be caused by a variety of factors such as hunger, cravings, boredom, stress, or emotional issues. It's important to understand the concept of serving size to not overeat in a way that can make it hard to maintain balance, nutrition and weight.