Yay controversy, right? I'll just cut straight to it. In the beginning of my story, my mc violently escapes a "research lab" based in the upper middle floors in an NYC skyscraper. I need an idea for the cause of the explosion. The mc is already almost down the elevator/stairs by the time the explosion happens. The explosion is big enough to draw lots of attention, but not big enough to knock the skyscraper down. There is certain magical elements in the setting, so a magic explosion isn't out of the question. The "research lab" is a front for an organization to experiment with "curses", which are more like magic induced mutations. Don't know if any more context would be necessary. I've been trying to think of a way to get this to work for a good four hours now, any idea at all will help.