Freaky-deaky stuff - these downtown underground explosions, no? I can't help but think back to about early '04 when TM'ers were discussing all the underground tunnels in various places. Indy has a pretty significant tunnel system in the downtown area, which I have been in one part of briefly a few years back.
Couple that fact with the large muslim population in Plainfield, IN - just 20 miles or so to the west of downtown Indy, and it makes one really wonder...
There are many explosive vapors/gasses are generally heavier than the regular air we breath. They will seek out the lowest spots. Plus it doesn't help when people illegally dump flamable materials down storm drains and sewers. I've been monitoring these explosions and see nothing out of the ordinary that would suggest terrorism.