An MRI is requested for various issues. Waiting sometimes means the ones ahead of you have a more serious condition or simple were scheduled ahead of you. Even if you are scheduled sometimes you get pushed back for a priority case, Of course being young and never having to go through it, he wouldn't understand that. The bigger issue I have is that IF he did say "Do you know who I am", which I question, it shows a selfish attitude and a me first type of mentality. Is he a team player or an I'm all out for me, player?