They’ll never learn.

Heart-pounding video footage captured a lone subway surfer dashing across the top of a J train in Brooklyn — the latest example of the dangerous transit trend plaguing the Big Apple.

The unidentified risk-taker runs atop six cars on elevated tracks near the Hewes Street station shortly before 2 p.m. Monday, with the train at a standstill, the clip obtained by The Post shows.

The potentially lethal trend continues to be a concern for the NYPD and city officials following several deaths and serious injuries to youngsters looking for an ill-conceived adrenaline rush.