The worse thing I heard was when during a match of Halo a friend in my party said his mom was calling him and so when he left we were still able to hear his mom calling his name weirdly, then suddenly he was offline. The other guy in my party who is also a friend later received a text from him and we both found out we were hearing his mom having a heart attack. The rest of the night we were just depressingly sitting in the lobby.