Investigators said Kamrowski and Fitzgerald had been exchanging insurance information after a minor sideswipe on I-90 Saturday afternoon when they started to argue.
State police say the two men got into a minor crash, started arguing, and somehow Kamrowski ended up on the hood of the auto. That's when Kamrowski jumped on the hood of Fitzgerald's SUV.
Other motorists also remonstrated with Fitzgerald to try to stop him, with Kamrowski's ordeal finally ending when the Infiniti got caught up in traffic.
A man with a gun orders Mark Fitzgerald out of his SUV.
Kamrowski and Fitzgerald were both arrested.
Kamrowski says he went into survival mode when he found himself clinging to another driver's SUV.
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"I just kept telling him to "stop the vehicle, stop the car" and he wouldn't stop", the 65-year-old said.
"He was propelled onto the hood and while he was on the hood he was trying to get the auto to stop and that was the first time he struck the vehicle with the water bottle", Kamrowski's attorney, Joe Comenzo, told reporters Monday.
Kamrowski claimed Fitzgerald swerved into his lane and bumped his vehicle.
"They did not read the part of the eyewitness who says that the other party was the aggressor, the other party was angry, the other party approached Mr. Fitzgerald's vehicle and appeared to be fighting him", he said outside of court.
"We're confident that as the facts are revealed and the witnesses and more footage come forward, it will be clear that Mr. Kamrowski was standing in front of the vehicle, had not done anything aggressive", Comenzo said. That's when he ended up on the hood after getting bumped by the SUV. One man forced Fitzgerald out of the vehicle at gunpoint. According to local station WBZ4, the good Samaritan that managed to get Fitzgerald to pull over was not charged after it was confirmed that he had a valid license to carry a firearm.
Fitzgerald, of Lynn, is charged with assault with a unsafe weapon and other violations. The man with the gun and another driver kept Fitzgerald there until troopers arrived. He is not facing any charges.