Tinfoil hat alert

Just got a call from Elissa, who announced "the computer in the bedroom is talking to me.......from NASA."   
No open or minimized windows, just a voice coming from nowhere.

A little digging with Task Manager led her to a firefox process still hanging around streaming the audio from the LCROSS impact we'd watched this morning. 
Could be worse -- it could have been talking in Rod Serling's voice.......