I finally got Spotify.
Jon: I was just curious to hear Ocean Avenue Acoustic!
Adam Robot: Sure…
There was increased security at the [Eminem] concert following 6 stabbings and 2 fatalities at a Swedish House Mafia gig at the nearby Phoenix Park in 2012. [source]
Six stabbings and two fatalities at a Swedish House Mafia concert?
[googles "stabbings swedish house mafia"]
Horror Film Idea: Rave Danger. "At a Swedish House Mafia concert, no one can hear you scream."
"Based on a true story."