Only Dane Cook could turn a charity performance for the Boston Strong concert into a catastrophe. For those who haven’t heard, Boston Strong was a music and comedy benefit concert for the victims of the Boston Marathon bombings. The lineup included Aerosmith, New Kids on the Block, and James Taylor and Carole King, as well as several comedy acts. The sold-out, six-hour concert was also livestreamed on multiple audio and video feeds for those who could not attend in person, including not just average Americans but some Boston Marathon bombing victims as well. Imagine people’s surprise, then, when the feed...