U2 Vertigo - Un, Dos, Tres, Catorce??

What the heck is up with U2's song Vertigo? Bono starts it by saying "un, dos, tres, catorce!" which is "one, two, three, fourteen!" And when counting out for opening a song, typically it's more proper to say "uno". Why 14? Some people I guess mistake it for four, but wouldn't a song by U2 get a little proofreading before they make a TV commercial using it? I hate hearing it, even if it was on purpose, imagine how ugly yelling out "a, two, three, fourteen!" is before a song.