The moment Scott Laughton realized just how big a jump it would be from junior hockey to the NHL came last January when he felt a stick ramming across his back during a Flyers training-camp drill. The 2012 No. 1 draft pick was used to being knocked around in front of nets, but not by anyone as big as Nick Grossmann, an experienced 6-foot-4, 230-pound defenseman. “You notice there’s a little bit of a difference from a 16-year-old to a veteran in the NHL,” Laughton said Monday after the first of two Monday on-ice workouts at Flyers prospect camp. Laughton, who turned 19 in May, laughed telling the story. Although spending most of last season back in the Ontario Hockey League with the Oshawa Generals, he began the lockout-shortened NHL season playing five NHL games as the Flyers’ fourth-line center, which led to more realization that he needed to get stronger. Laughton, who stands 6-foot-1, began last season at 190 pounds and finished at 180. “I’m up to 194 now,” the Oakville, Ontario, native said with a sense of pride. “I want to be lean and big.” Come September, Laughton will be in a similar position as he was last January for Flyers training camp. With another season of junior eligibility, he can be sent back to junior, spend all season in the NHL or play a few more games with the Flyers without eating up a year on his Entry Level Contract.