Wow, Ricardo, that's a hard question. I guess for me my initial reaction was to feel that the whole thing was unreal, that I couldn't really be there. The musical introduction leading up to Elvis coming on stage was just fantastic and unbelievably exciting and then he was there with that beautiful smile and the whole audience is dead quiet until he started to sing.
He would run you through a series of a few ballads, a few rockers until your emotions were going back and forth so much that by the time you left the concert you felt exhausted...at least I did.
To me it finally felt good to have seen him in person at last and feel like I was relating to a flesh and blood Elvis not just pictures and movies.