Honestly they might have but all I heard was a gigantic yell; I could not discern what was being said and I played it back over in my head a few times but couldn't figure it out.

I spoke to some other people in line at Starbucks and asked "what did you make of that". And they said the same thing as me - they were nervous until they saw them smiling.

And maybe it's not such a bad thing they were smiling - as soon as I saw that, my heart stopped pounding and I thought "well, they wouldn't be this light-hearted if it was for real," so it actually made me feel better...