I had that happen at my condo in Dorchester. Was on my laptop. Flash boom...thought my condo got hit. Neighbor ran outside said he felt a shock as he was doing some plumbing. I looked up and noticed the arcing from the pole in front of my condo. It hit the insulators to the top wires. To this day, never felt anything like it. Like a flash bomb went off in my condo with my ears against a cannon.