The bestest thing I ever heard was in November 2011 in Hikkaduwa, Sri Lanka, as I was in my zone, dancing the night and morning away (9 hrs non-stop!), someone at the behind told his friend "look at that guy, it seems the music is made for his brains".
I really was one with the music, the bass, the kick drum, the synths, the everything. Not even the best sex comes close to that feeling :))