A man is still in the hospital after being severely injured when an explosive device went off at a Fourth of July party in Manville.

Nicholas Barras, 24, jumped into action to save a man's life at a party on Saturday after an explosive device went off. News 12 New Jersey’s Lauren Due talked with the good Samaritan who helped give lifesaving efforts.

“I came up here, the man was down laying on his back, there was blood all over the grass, a bunch of people were standing out that way,” Barras told News 12 while pointing at the area where the party took place.

“I applied dressing to his abdomen where he was injured and held pressure along with having someone else make sure that he was staying alert and conscious and able to just be awake,” he said.

MORE: Father, son arrested for setting off explosive and injuring person at Fourth of July party in Manville

The device exploded after being lit, sending shrapnel throughout the neighborhood damaging homes and vehicles.

Barras said he was napping around 8:15 p.m. when we heard a loud boom. He just used his instincts, grabbed his First Aid bag and ran towards the panic.

“I don't know this man. I've never seen him before in my life. I didn't even know there was a block party going on,” he said. “I never actually got my EMT license, but I sat through all the courses and passed every class for the national registry.

Manville police said a 34-year-old was airlifted to New Brunswick Trauma Hospital.

“I hope he pulls through; I hope he's able to make a recovery. I know it's going to be a long and rough road ahead,” Barras said.

Barras said the last he's heard about the man was on Sunday and that he’s in critical condition.

A father and son were arrested by police. Thomas Kaiser, of South Plainfield, and Erich Kaiser, of Monmouth Junction, were charged with aggravated assault, possession of explosive device and criminal mischief. Both men were released pending their first court appearance.