therapy, drugs, etc.
If you hadn't said the "feel it" part, I would have said that it was a coincidence / freak occurrence of acoustics. Like when you stand on one side of a dome and can hear someone whispering on the other side of the dome clear as day. There are several documented occurrences of crazy acoustics. Sound bounces and reflects. If enough variables coincidentally aligned that morning, you could have simply been hearing a conversation a cube or two down.
However, you said you felt it. That makes you crazy.