Told my boss "I am the best decision this organization has ever made" on my first day as an intern, did I screw up?

Recently started my first internship as a finance major... On my first day I went over to my manger's manager (a director at said firm) and introduced myself. He said something like "you must be the new intern" and I replied "that's right and I am the best decision this organization has ever made" (just what tom brady told the team owner before winning 6 super bowls) but instead of being impressed he just replied something like "yeah... I can tell... anyway I need to take a call see you around".

Later that day I saw the HR Manager who hired me walk into his office, not sure if that's out of the ordinary. Also, the first year analyst came over to me and told me "You're a legend mate, want to grab a coffee"? Not sure why he talks like that, he's not even british.

Did I screw up or did I make a good impression? I am really not sure how to read the situation.