Yeah, the explanation offered by a parent, and described at the link I left, is interesting. According to that account, an adult told the boys to make what was described as "the high sign", and the boys responded in varying ways....
"Jen Terkington, wife of a Baraboo High School Football coach, described to NBC15 how the picture-taking incident unfolded.
"A man - a parent - came forward and started shouting instructions for the boys do this, do that and at one point he told the boys make the 'high sign.' The boys weren’t quite sure what to do. Some were waving high, some were raising their hand high, some were looking around not sure what to do. And that was it," Terkington said."