Police are still searching for the arsonist responsible for a gas pump fire early Monday morning. 

Shocking video shows massive flames that left one bystander with serious injuries. 

A man dips his hose into a canister full of gasoline, then douses this pump before grabbing a paper receipt, lighting it on fire and throwing it to the ground, sending a massive burst of flames into the air, as he jumps back. 

Police say the mystery arsonist bought gas rom an employee moments before, who told us off camera he sensed something was off. 

He says he tried to take the can away from the suspect and even shut off the pumps, but it was too late. 

“They never seen him before it was just like a random thing,” said Giovanni Viscello, friend of the gas station manager. 

Investigators believe the suspect and employee got into an argument about the purchase just before 2 Monday morning at the Richmond Avenue BP gas station. 

The sudden fire seriously injured an innocent 21-year-old man who inhaled fumes and burnt his feet. 

The clerk tells us the suspect’s shoes also caught on fire, but he was able to kick them off and drive away in his blue minivan as foam helped put out the flames. 

He was last seen wearing a light-colored long-sleeved shirt, dark-colored shorts, and dark-colored slippers.

“That’s probably the worst thing I’ve ever heard,” said resident Amanda Deangelis, whose husband owns a gas station nearby. 

She’ll now be warning him to be extra cautious. 

The 21-year-old injured suffered internal injuries. 

He’s hospitalized and in serious but stable condition. 

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