What did Sam do when he started sneezing uncontrollably?

When Sam started sneezing uncontrollably, he called his mom. This action indicates that he felt the need for assistance or concern regarding his condition. It's common for individuals to seek comfort or help from family members when they experience unexpected health issues, especially if the symptoms are intense or persistent. Calling a parent might also suggest that Sam trusted her to provide guidance on what to do next, whether that involved finding a remedy, assessing the situation, or determining if medical attention was necessary.

Other options such as continuing to play, ignoring the sneezing, or going outside do not align with the typical response one might have to an overwhelming physical reaction like uncontrollable sneezing, which normally warrants attention and care rather than dismissal or distraction.