The Rochester, N.Y., Aquinas class of 2016 quarterback came to University Park June 8 hoping for a similar performance.
Turns out, it was even better.
Zembiec was the top passer at the Lions' first football camp of the summer, leading to an offer before the day was through.
"It feels awesome," Zembiec said. "It just makes everything worth it, like all the work you put in just keeping in touch and stuff like that.
"They were saying they really like my film. They feel like it's a fit, and I obviously feel like it's a great fit."
The passer worked mostly with Rahne during the five hour camp, but he wasn't the only assistant the junior-to-be spoke with.
"Their real excited about what we're building," Zembiec said. "They liked what they saw [last Sunday] and all the coaches kept walking up to me, talking to me, correcting me; they made me feel real good, and made me feel like it was worth the trip to come down here."
The 6-foot-3, 205-pounder showed touch and plenty of arm strength when throwing the ball around Holuba Hall. Afterward, he met with the staff.
Normally, a campus tour would have followed. Since Zembiec visited in the spring, though, he had already seen some of the Lions' academic buildings and facilities.
Instead, the quarterback headed home pondering ways to quickly implement what he learned throughout the day. The tips and pointers were plenty, he said, and used as another way to get to know Rahne better.
"The biggest thing I learned was probably just taking my time on reads," he said. "That's one of the big things. That applies right to game day. It's hard to get down but once you start perfecting that, then everything will come easy.
"I felt real good. It was kind of weird moving inside with the lighting, but we threw good."
Zembiec is one of three class of 2016 passers the Lions have offered, coming after the program offered Pennsylvania quarterback Brandon McIlwain and before it offered five-star Westlake Village, Calif., Westlake passer Malik Henry.