A high school senior from Louisiana got a perfect score on the ACT exam, a standardized test that measures a student's skills in English, math, reading, science, and writing.
Darius Washington, 16, said he didn't think he'd done that well the last time the took the ACT, according to The News Star newspaper.
So, when he learned he'd gotten a perfect score, he was in shock.
The ACT is like any exam: its difficulty really depends on who you ask.
A rare perfect score
The Neville High School student earned 36 on the ACT, which is a rare perfect score.
According to data from ACT, 1.9 million students took the test in the class of 2015 during their sophomore, junior or senior years.
Of those, only less than 1,600 made a perfect score.
People have been congratulating Washington on social media.
'Manage your time wisely'
Washington said advises other students not to stress too much over the exam because that will burn them out before they take the test.
"Manage your time wisely because if you run out of time that directly affects your score. If you don't get to questions, then you can't answer them," he said.
He plans to attend the University of Louisiana at Monroe and major in computer science.