According to local reporters, the man was stabbed with the kitchen knife and then walked a block up to the McDonald's where he then made a phone call in front of stunned customers.
The man began to pass out and people rushed to make sure the knife wouldn't go in any further. Also, someone took a bunch of photos.
He was rushed to Jamaica Hospital and police have described his condition as serious, but stable.
Ryan Broderick is a reporter for BuzzFeed News and is based in London.
Contact Ryan Broderick at email@example.com.
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