As Colin Yost starts wrapping up his valedictorian speech at Portsmouth High School's graduation ceremony, the edges of his mouth curl upwards into a mischievous grin. His face lights up and seems to foreshadow something big.
His next move is about to be even more epic than the last four years of his prolific high school career.
The familiar beat of the popular Taylor Swift anthem "Shake It Off" bounces through the gym's loud speakers and he proceeds to bounce along with it to his audience's delight.
He and his classmates had planned to make their graduation ceremony into a flash mob, and they definitely pulled it off.
Watch their incredible end-of-the-year surprise for their families — and the millions of people who have now watched their video on YouTube.
Another school did something similar! Read more here.