I scream, you scream, we all set cars on fire for ice cream!

Witnesses say a Florida woman gave a man's car the ol' gasoline-plus-fire-combo after he refused to purchase a McFlurry dessert for her at McDonald's.

Bystanders watched the unnamed pair as their argument over frozen treats escalated (something tells us there was more going on here) around 12:30 a.m. Sunday at the McDonald's near St. Johns Bluff, WFTV reports.

"Next thing you know, she says 'I'm going to blow it up,' and we were wondering what are you going to blow up?" witness Sabryna Maré told Action News Jax.

Answer: The dude's car.

"She got something out of the car that happened to be a bottle and then she got gasoline from who knows where," Maré explained. "Then she poured everything all over it and next thing you know there was a match and it was up in flames."

The Jacksonville Fire and Rescue arrived to put out the flaming 1994 El Dorado, but by then the suspect was gone. An investigation into the incident is ongoing.