A San Francisco Giants fan attending Friday night's game against the Pirates became the hero of the area in and around his section when he sprung into action to put a stop to the wave.
Video of this situation features a person in a white shirt being That Guy (aka standing and commanding that people start the wave at the end of his countdown). While he got the attention of some people in his section, most people were looking away. Among the people looking at this person was a fan in a hoodie and orange hat leading a countering "NO WAVE!