Nishan Harichandran went to school with the four teenagers involved in Sunday's fatal crash on U.S. 23 in Livingston county.
"They were so young and they're gone," he said. "It's a lot to grasp."
He and his brother Vik made a facebook event called 'Suit Up for Those Who Were Lost on 10/10/10.' Wednesday is also International Suit Up Day, inspired by the TV show How I Met Your Mother.
"I'm going to wear a suit to show how much I care for my friends who passed away," said Harichandran.
The event urges anyone who knew those involved or affected by Sunday's two fatal accidents to suit up. Thousands of people RSVP'ed and did just that.
All day Wednesday students here at Okemos High School walked these halls dressed to the nines. About half the student body participated.
But it wasn't just at Okemos High. People everywhere from MSU to Washington D.C., even people overseas were suiting up.
"There are people in Germany suiting up, people in England, Scotland, all over the world," Harichandran said.
These girls not only dressed up, but also planned a vigil for Wednesday night. They knew Okemos grads Matt Colstoe.
"He was always making jokes and putting a smile on everyone's face," said junior Alison Crites.
They also remembered Heather Comstock.
"She was really silly, really funny," said junior Savannah Smith.
Smith also talked about Sarina Seger.
"She was going to be a great teacher," she said.
Harichandran plans on making collages of everyone dressed up in suits and giving them to the victims' familes.