VANCOUVER, Wash. – A homeless man was arrested near Columbia River High School this week after he followed a female student into the building and took a seat in her class with a lit cigarette, then ran away.

Clark County Sheriff’s deputies told The Columbian 34-year-old Pini Nou followed Columbia River senior Ayla Stoops from the school’s parking lot and into the building around 12:20 p.m. Wednesday.

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Nou allegedly followed the teen past the office without checking in and into her classroom, where he blasted loud music and smoked a cigarette before the teacher asked him to leave, KOIN reports.

“Something really bad could have happened,” Stoops told KOIN. “He could have had a gun.”

“I didn’t realize I was being followed until he came into the classroom,” she said.

“He had loud music blasting,” student Braylynn Marston told KATU, “so I just thought it was a student but then we kind of turned around and it was some guy in there.”

Horticulture teacher Jois Brownstein said Nou followed Stoops from a bus stop and sat next to her in the classroom. He seemed to have some sort of mental issue, she said.

“I looked at him, because I’m a little surprised because someone’s smoking a cigarette in my classroom,” she said.

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The teacher ordered Nou to leave, but he initially refused.

“He had kind of a creepy chuckle,” Marston said. “And then he just walked out.”

“I locked my door and called security and that was it,” Brownstein told The Columbian.

Police contend Nou bolted from the building when school security arrived, pulled a ski mask over his face, and ran into a nearby neighborhood. Deputies eventually located him hiding behind Lenny Kipp’s shed in the man’s back yark.

“It was a good spot … to come, I guess,” Kipp said.

Nou apparently did not want to go with deputies and became combative, police said, so an officer shocked him with a Taser to take him into custody. Nou was treated for minor injuries at Legacy Salmon Creek Medical Center. He was arraigned Thursday on suspicion of second-degree burglary, second-degree criminal trespass, resisting arrest and disturbing school activities, The Columbian reports.

School officials later sent an automated voice message to parents.

“This afternoon an unknown male followed a female student into her classroom,” the message said. “The teacher asked the male to leave the classroom which he did. The young man was taken into custody by the Clark County Sheriff’s department off campus, shortly after the incident was reported.”

According to Fox 12, “Criminal records show (Nou) was convicted of misdemeanor riot in 2001 for his role in a destructive New Year’s Eve riot in downtown Portland, and was convicted of 4th degree assault in Washington in 2013.”