I used mixxx to DJ my brother's wedding. I think it was 2013 or 2014. The moment I got the signal to switch to a specific track for the bride's first dance with her Father, mixxx locked up my laptop. Guests were staring at me, one offered a hushed, "they're waiting!" Completely unresponsive, I had to hard reboot my locked up computer and boot back into Ubuntu. Then I opened VLC where I played the tracks for the rest of the evening. Probably not mixxx's fault, but I will never forget that moment.