Lansing — An MSU student was sentenced to probation and jail time Wednesday for setting off a small explosive outside Bailey Hall in April.

Psychology sophomore Kyle Robert Graff, 19, was sentenced to four days in Ingham County Jail and three years probation after pleading guilty to possessing explosives with the attempt to terrorize.

Graff, a South Lyon resident, will serve three days in the jail beginning July 27 because he already has served one of those days, and will reimburse Ingham County $500.

"You can think about being successful," said Judge James Giddings, of Lansing's 30th Judicial Circuit Court, after handing down the sentence.

A remorseful and conscientious Graff explained in court how his actions affected and disappointed his family.

"I realize how many people I've let down and how fragile life can be," Graff said. "I want to show my dad how successful I can be."

Graff asked to delay his sentence until July 27, in order to spend the weekend with his father, who is ill, said Matt Savich, Graff's attorney.

Graff was arrested April 13 after throwing an explosive outside of Bailey Hall in the Brody Complex courtyards at approximately 1:03 a.m., according to MSU police.

The explosive device caused about $150 in damage to the courtyard and to one window.

Students described the incident as a flash of light followed by a rumbling, which caused the ground to shake beneath them in both Bailey and Emmons halls.

Graff's older brother is a professional when it comes to handling fireworks, Savich said.

"You scared the bejesus out of people," Giddings said. "And in these times, people are a little on edge."

Graff said he has been seeking psychological help and has been diagnosed by his psychiatrist with attention deficit disorder, though he was not attempting to use the disorder as an excuse.

Graff, who will be attending Washtenaw Community College in the fall, also said he was avoiding activities that would get him into trouble and has been helping his family around the house.