I was on a mid sized two engine commuter that had started its take off and almost halfway through the pilot pulled an emergency abort....very scary... Pilot said something about an engine light.... they pulled us back into the gate and then pronounced that same plane safe and we reloaded for another takeoff.....I've been on an airplane that almost had this happen. I had no idea how well the brakes worked on a 737. We "hopped" to a complete stop when another jet crossed our path on the way to the runway.