The engineers of the two commuter trains were both suffering from severe sleep apnea and have no memory of the crashes, according to investigative reports and interview transcripts made public Thursday, reports WABC.

NJ Transit engineer Thomas Gallagher told investigators he only remembered looking at his watch and the speedometer, blowing the horn and ringing the bell before his packed rush-hour train slammed into Hoboken Terminal at more than double the 10 mph speed limit.