A gold Wolverine swam in the water while his father made a record of it. Wolverine is gold in color because he just won the gold medal in swimming, so now he is gold. Way to go, Wolverine.
Since Wolverine is actually a mutant, he is soon disqualified from his gold medal. His father makes a record of this also. One angry fan threw a rock (ろく) at Wolverine afterwards. Then another threw a rock. And another rock. Before you knew it, everyone was throwing rocks at Wolverine. Wolverine’s dad didn’t step in to help though, he just kept keeping records.