The accused serial subway brake yanker who is being eyed for causing as many as 750 train delays was speechless as he was hauled out of a Manhattan police station in cuffs Friday morning.

Isaiah Thompson, 23, was arrested just before midnight Thursday at his Bedford-Stuyvesant home for allegedly pulling the emergency brake on a northbound 2 train near 14th Street in Manhattan on Tuesday.

Cops worked off a tip to identify the subway saboteur — who was caught on video last year dangerously surfing a C train as it whizzed between stations.

Wearing a black sweatshirt, black sweatpants and black and red sneakers, Thompson looked glum as detectives escorted him out of the Transit District 2 headquarters at West Broadway and Lispenard Street.

He was hit with reckless endangerment and criminal trespass charges, cops said.

Thompson was also nabbed for a May 16 incident in which he rode on the back of a subway car and exposed himself, authorities said. He was charged with reckless endangerment, public lewdness and criminal trespass.

Police are investigating whether Thompson is also responsible for causing some 750 subway delays and cancellations since February alone.