Robbie chased the shark, he catched it, but instead of his fresh cheese pizza the shark droped another message from Tanma, which said that mandr has already conquered Mars, and he has captured his Dear Girlfriend Rubina. He has to choose to either stay at the beach, or go complete the mission and save his Girlfriend. He had no choice. He had to go. After that he could go to the beach with his Girlfriend instead of going alone.