Yesterday at 7 p.m., a van jumped the curb at East 125th Street and Lexington Avenue. The van, traveling south on Lexington, crashed into a 4, 5, 6 subway entrance and hit a number of people--including a child, who was pinned under the vehicle. It's unclear why the van jumped the curb, but witnesses ">said the vehicle wasn't forced off the road and suggested the driver may have passed out or had a heart......