The unidentified man walked into the Sutphin Boulevard eatery, between Jamaica and Archer avenues, with the blade sticking out of his left shoulder around 10 a.m., witnesses said.
"Everybody was screaming, there was a lot of commotion," said Tromaine Yancey, 27, of South Jamaica, who was being interviewed for a job when the victim walked inside.
Yancey said the man, whom police described as being in his 50s, was on the phone talking to his family “trying to make sure they knew what happened.
"He was worried that it might be the last time he talked to them," he said.
At some point the man fell on the floor and patrons were trying to make sure that he didn't fall on his back.
"It was shocking to me because he was still standing there with the knife in his back," Yancey said. "He was bleeding a lot."
Police sources said that according to witnesses the man was involved in a fight that occurred on Sutphin Boulevard minutes earlier.
He was taken to Jamaica Hospital with the knife still stuck in his body.
Sources said police are looking for two suspects who fled the location.
The eatery is located in one of the busiest spots in the neighborhood, near the AirTrain and Sutphin Boulevard subway station.
Less than two hours after the bloodshed, the eatery was once again open for business.