My guess (not a chemist, battery enthusiast, or firefighter) is that the lithium exploded, and what remains is a cacophony of MacBook burning plastic fumes. It'

My guess (not a chemist, battery enthusiast, or firefighter) is that the lithium exploded, and what remains is a cacophony of MacBook burning plastic fumes. It's not like it's LETHAL, just toxic enough to cause chemical burns, eye irritation, or cancer[0] through single exposure. There are several types of lithium too so I'm not sure what the right one is. The timing of his Reddit post t+5 days without any reported symptoms is probably a good sign. Was probably concerned his house was on fire. [0] http://www.inchem.org/documents/icsc/icsc/eics0710.htm http://www.inchem.org/documents/icsc/icsc/eics0710.htm