The cycling zombie icon looks like it's talking, but it's just a trick of the colors shifting.
It looks to me like it's saying "five" over and over.
Daydreaming about being a superhero in the shower earlier... "He can do whatever he puts his mind to!" or basically, anything that he says and actively believes. Johnny Quick meets Green Lantern, I guess.
I started off by thinking about a kid at a slumber party doing one of those "Light as a feather / Stiff as a board" things, and becoming a crimefighter when he realized that he could fly and was as tough as petrified wood. (Though the abilities only last as long as he keeps repeating the mantra.)
I figured it'd only be a matter of time before he used music to get other abilities... (and it's a shame that he's not terribly creative or self-actualized.. if he believed in himself rather than a mantra, he'd probably become Doc Manhattan or something.)
If I could do what songs / common "sing-song" sayings said... what would I pick?
Well, the easy pick would be
"I'm rubber and you're glue, bounce off me and stick to you." - would be good against gunmen.
Maybe Grant Morrison would have him discover Krishna? "Aum gum Ganapataye namah", perhaps?
Superman - REM would be mighty handy, but would probably cause some distress for Mr. Kent.
Heck, anything by Ookla the Mok, I guess.
What song(s) or chant(s) would you use to be a superhuman?
(feel free to answer in comments, too)