That was some fire.
Today I had the fortune/misfortune of being at the top of the Prudential Center at about 3pm, when I spotted an enormous plume of smoke coming up from a building towards the Charles River.
I actually just thought it was some steam, but the closer I looked, the scarier it looked.
Whenever things like that happen, I want to go over and see it closer. The journalist in me I guess.
The fire (looking kind of miniature, but also in panorama):