Manhole Explosion?!

Holy crap- Brooklyn Record reports that a manhole cover exploded on Clinton and Greene last night. I actually did hear it happen.  I was sitting at my kitchen table, and the noise made me jump from my chair.  It set off all the car alarms on Waverly Ave.  I can only see the Waverly-Greene intersection though from my window, but I kept looking out to see what might have happened.

It's a post-9-11 reaction.  Every time I hear a loud noise, I get nervous.  Hopefully everyone is OK.