Distraught relatives and friends gathered Friday for the funeral of a sweet 11-year-old boy who was killed subway surfing — as his grandmother blamed his school for the tragic death. Cayden Thompson slipped out of Fort Greene Preparatory Academy Monday morning before his deadly ride atop a G train,

An uncle of the 11-year-old boy killed subway surfing in Brooklyn blames himself and social media for the boy’s tragic death. Victim Cayden Thompson was riding on top of a G train when he struck his head on an overhang at the Fourth Ave.