A Boston University graduate student killed while riding his bicycle described the pivotal moment when he decided he wanted to become a photojournalist in an obituary he wrote for himself for a class assignment.

Christopher Weigl (WYE'-guhl) was on his way to class Thursday when he was struck by a truck.

He wrote his obituary in September and it was reprinted in The Boston Globe ( http://b.globe.com/TLG1lL).

He wrote that "he cemented his love for photojournalism" during a trip to southeast Asia following graduation from Skidmore College when he did a story about the government takeover of a Cambodian island.

The 23-year-old Southborough native also wrote about his love of music and the outdoors.

His professor in the class called him "the ideal student: smart, mature, curious."

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Information from: The Boston Globe, http://www.boston.com/globe