It happened on Old Spanish Trail near Scott around 10 p.m. Friday and began when a driver ran over a gas station employee, according to Houston police.
The driver was in a Honda Accord and left the employee seriously injured when they ran them down. The employee was expected to survive.
When first responders arrived, police said that's when the driver assaulted a firefighter.
"It looks like he was also trying to fight some of these people after the initial assault happened," Sgt. David Rose said.
The driver faces at least one charge of assaulting a public servant.