Sullivan was actually behind the opposing bench when Crosby scored his first NHL goal on Oct. 8, 2005 versus Boston at Mellon Arena. In the years since, particularly the last seven as head coach of the Penguins, Sullivan has witnessed a fair number of milestones with respect to his captain - and said tonight's might be the most special one.
"He's in very elite company, and he's so deserving," Sullivan said. "His legacy, I think, speaks for itself. But to see the reaction, just the raw emotion on the bench - it gives you goosebumps when you're watching it up close, like we were as a coaching staff. It was just really a cool experience.
"To have an opportunity to have the privilege of being his coach and winning some Stanley Cups with him, and then having the opportunity to experience some of his personal milestones along the way, has just been an unbelievable honor for me."
That entire time, the Penguins fans in attendance were on their feet. Their energy had been palpable before the puck even dropped, and you could sense that everyone had been on the edge of their seats every time Crosby was on the ice leading up to the goal.
It crescendoed when he scored, with the crowd cheering their appreciation for the Kid who came to Pittsburgh after being drafted first overall in 2005 and has provided them with countless amazing moments ever since, with this being the latest.
They only got louder as Crosby returned to the bench, and when they showed him on the videoboard, he stood up to acknowledge the Penguins faithful, waving before putting his hand to his heart. Jeff Carter pulled a veteran move and waited until the last possible second to put his stick down for the ensuing faceoff so that Crosby could soak it all in for as long as possible, with the fans loudly chanting his name.
"It was awesome to be able to do it here and feel that energy," Crosby said. "That's something I felt at different points over the years, whether it's playoffs or big games, big moments. So that's a pretty cool experience to add."
When the Penguins returned for the second period, a congratulatory video from Mario Lemieux - the only other player to score 500 goals with Pittsburgh - played during the first TV timeout.
"Hey Sid. Congratulations on your 500th goal," Lemieux said. "I've been able to witness most of them, incredible goals over the years. I'm sure there'll be plenty more in the future. So again, congratulations, enjoy tonight, and all the best to you, my friend."