The victim was on a northbound 4 train shortly before 11:30 a.m. when his attacker, who had been sleeping, woke up and began screaming at him, police said.
When the victim and his girlfriend got off at the Atlantic Avenue-Barclays Center stop, the man also got off and followed the couple, then pushed the man on the southbound tracks before running off.
The victim was able to get back on the platform and was not seriously hurt, police said.
The incident comes on the heels of several subway shoving incidents in the Big Apple, including two on back-to-back days last week.
On Thursday, a 40-year-old Brooklyn woman was pushed onto the trackbed at the 14th Street-Union Square station in a horrifying caught-on-video attack. Victim Liliana Sagbaicela later told The Post she had no memory of the incident.
Late Wednesday, a subway rider was shoved onto the tracks at the Bryant Park station by a panhandler. The 36-year-old victim also escaped serious injury, according to police.
Frank Miles is a reporter and editor covering geopolitics, military, crime, technology and sports for FoxNews.com. His email is Frank.Miles@foxnews.com.