We were driving through Somerville with a horse trailer and we saw the man going towards oncoming traffic on a lawnmower. If we would have been in the right lane we would of hit him. There were no lights to warn anyone. A few minutes later we saw an ambulance heading towards that direction. I was curious and googled the news for Somerville and I have to say I am not surprised. I feel horrible for the driver, I know there is no way she had any warning.