Jimmy Fallon made a surprise visit at Marjory Stoneman Douglas High School's graduation ceremony on Sunday, nearly four months after the students survived a shooting that killed 17 of their classmates and teachers.
In his commencement speech, Fallon offered comic relief and thanked the student activists who have been spearheading gun control reform.
"Today you're graduating from high school," Fallon, host of The Tonight Show, said. "You should feel incredibly proud of yourselves. That doesn't mean you should rest on your laurels — or your yannys."
Yannys and Laurels aside, he continued, "Here's what will matter: You, the class of 2018, will have graduated. And you won't be classmates anymore. You'll be adults who Facebook search each other at two in the morning for the next 10 years."
In simultaneous dig at himself, and a nod to the far-reaching movement inspired by MSD students who showed not all change-makers are adults, Fallon humorously ushered in the occasion as "Opposite Day."
"When you think of commencement speakers, you think of people who are inspirational, people who are eloquent, people who've changed the world," he said. "When you think of high school students, you think of people who are immature, slightly awkward, still learning to be an adult."