The flaming Zamboni is barely giving off any smoke despite the fact that the fire is melting plastics and other combustibles, giving off a definite black column toxic smoke.
These firefighters are using CO2 fire extinguishers, noted for their large nozzles, but have the ABC label on their tanks. This is not possible. CO2 are BC extinguishers, meaning they have no effect on A type fires.
The firefighters don't want to use water on the flaming Zamboni because it's battery powered. Dousing the vehicle with water will not cause a battery to explode or otherwise react.
The patient is loaded onto a stretcher on the ice with the firefighters saying the want to move him back to the opposite side of the rink where they started from. They fail to see there's a exit door immediately next to them that would not only get them off the ice but also away from the flaming Zamboni.
The patient lays in the center of the ice rink. Firefighter Sullivan ventures onto the ice and moves him to the opposite side of the rink from everyone else. He could have just brought the patient back to where Sullivan started from.
Captain asks one of the ice rink employees if they have a ladder they can use. She forgets the fact that their own fire engine has ladders.