Sentence 1: He waited on the edge of the crowd, biding his time. 
 Sentence 3: He weaved along the crowd's edge with excitement 
 Sentence 4:  Suddenly he pushed his way in and walked to the edge of the counter 
 Sentence 5:  He felt his confidence grow as he took aim and scored a ten 
 Given Sentence 2: So when he started to learn how to skateboard, he took many risks.