First, there was a realization the Dunbar High (Baltimore) defensive end would soon be signing his binding national letter of intent, and he would be enrolling a few months later.
Second, was a more light-hearted thought.
"I was thinking, hopefully, the campus isn't too big because I walk slow," he said with a laugh, "and I'll be late to class."
Indeed, Gross was in a fantastic mood after a stellar visit to campus, which began when he arrived late Friday afternoon and immediately met with coach Dana Holgorsen and his staff.
"It was great," Gross said. "It was like going with all the coaches I grew up watching on t.v. and I was finally there. It was a surreal moment that I was actually doing it.
"They were great and funny and down to earth, just like they've always been throughout the recruiting process. It's like you were never separated. They picked right back up when we were talking."
Saturday was dominated by a tour of the campus and academic meetings, which Gross paid close attention to.
"I saw all the buildings I would be taking classes in," he said. "They had us meeting with the tutors and the academic (advisers)."
Gross was hosted by defensive lineman Eric Kinsey, and the two hit it off quickly.
"He plays defensive line, too, so he gave me a heads up of what to expect when it comes to practice and training camp and weights and everything like that," the 6-foot-3, 205-pound Gross said. "The coaches said they'll put a lot of weight on me, so not to gain any bad weight."
Gross also enjoyed his time hanging out with the rest of the recruits and players in the program.
"We got along great and I found out who I'm going to be rooming with, Elijah Wellman," Gross said. "We all were just hanging out and having the best of fun, and talking about it until we get down to business."