"I think that it just got too much throughout the three hours sitting next to somebody that, you know, is running their mouth," Kilmartin said.
Kilmartin said he turned on his phone and started recording. Screenshots from his video show the moments Mooney walked toward the men before things got physical.
"I just saw a guy in a Dolphins jersey come over, he delivered two punches, and at that point, everybody kind of let go of the guy, and he fell back into his seat, and he unfortunately never, never woke up," Kilmartin said.
The autopsy is not scheduled to be conducted on Monday.
No charges have been filed.