It happened during Free Comic Book Day:
Bobby Daggett of Portland, dressed as Green Lantern, said he witnessed the first assault.
“There were a bunch of people standing outside trying to drum up
business and one guy was dressed as a Stormtrooper,” said Daggett. “Out
of nowhere this guy tried to put [the guy in the Stormtrooper costume]
in a chokehold from behind and then throws him to the ground. He was
trying to be intimidating above him and screamed obscenities to
Barnes is 6 feet, 4 inches tall and weighs 300 pounds and was intoxicated at 2:30 p.m. when he was arrested, Hutcheson said.
Daggett said the scene was so bizarre that he didn’t think it was real.
“I didn’t think it was malicious [at first]. I thought they were
messing around,” said Daggett. “But the guy in costume had no idea who
this guy was.”
Barnes had walked across the street to commit the assault, Daggett said.
“Why would somebody just decide to go well out of their way to do it?” Daggett asked.
Daggett said he didn’t witness a man in a Ghostbusters costume get assaulted, but Hutcheson said Barnes punched the Ghostbuster.
Barnes was confronted by police a block away.
“He was taunting and challenging police officers and then he got Tased,” said Hutcheson."
Read more about it HERE