Surely our equivalent is called "You Were Up First".

"Oh no, you were up first!"

"No, that was just me sorting my song book out. You were definitely up first."

"But mine's just a silly thing, doesn't matter at all. *You* should go first..."

Massed ranks of filkers (radiating telepathically with steadily increasing intensity): "WILL ONE OF YOU JUST HURRY UP AND SING SOMETHING?!?"

=:o}

(See also: "Q: What's the slowest thing on four legs? A: Two Christians^* trying to get through a doorway."

^*(Or Englishmen, or Canadians, or whoever else is stereotyped as being excessively polite in your culture.)