like nervous or anything. >> reporter: dzhokhar worked out for awhile and didn't shy away when zack brought up the bombing. >> i was like, yeah, these things happen in other countries, maybe iraq and afghanistan and stuff like that. and he's like yeah, tragedies happen like this all the time, and it's sad. >> reporter: just days before helicopters and s.w.a.t. teams descended on umass-dartmouth dzhokhar was seen all over campus. students have to swipe their i.d. to get entrance to the building and records show tsarnaev did just that right here on wednesday. friends saw dzhokhar walking around his dorm. they say he went to this italian restaurant on wednesday, hanging out with other intramural soccer players. >> i think it was a pasta party for soccer team. >> reporter: in the campus buzz over the bombings, didn't seem to bother him. >> he was like, yeah, tragedies happen. like these things happen around the world, like it's crazy. >> reporter: and took some students, scary. >> i ate where he ate. i slept like a few feet away from him. i've had class where he had class. like, with a terrorist. >> reporter: chris lawrence,