I think he actually says
"C’mon
I’m just a little guy
You make me feel so big
Hola Mexico
Muchos huevos
Grandes, grandes
Muchos traffico
Eso es Mexico"
muchos huevos means something like lots of balls (in slang of course). Muchos trafico is said incorrectly (there shouldnt be an S at the end of muchos) ,the show started late the previous night because u2 was stuck in trafic trying to get to the venue, not uncommon in mexico city. "eso es mexico" is simply "that's it mexico".
this from a geniune native of mexico city ; )
Arriba!!!!!!!!