Chilling audio reveals Air Traffic Control trying to reach plane before Philadelphia crash, listen closely at 56 seconds

This video reveals the chilling audio when Air Traffic Control was trying to reach the Learjet 55 before it crashed in Northeast Philadelphia. The plane was traveling to Springfield-Branson National Airport in Missouri and was carrying a pediatric patient. Listen very closely around the 0:56 second mark. Do you hear something strange, someone saying something like 'you're f*cking with the wrong people' or something like that?