It's Frankie Say Relax, used to wear a shirt like that for a good couple of years, but yeah. that's a cool little tribute in a CoX way.
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Slag Heap: Why you hurt Guardian!? Guardian no hurt you!
I think just the word alone would be better, actually.
FREEM.
The Alt Alphabet ~ OPC: Other People's Characters ~ Terrific Screenshots of Cool ~ Superhero Fiction
I remember those shirts...jeeze getting old 
Pst, Lil Maynard is on "Freem"dom now.
Anyone remember those "Frankie says "Relax"" shirts? (I don't I was a child at the time but I know some pop culture refrences that predate me
). In any case when they did the April fool's day day gag about the text versions it reminded me of "Frankie" shirts. So I give you Energy Blast says Freem. This *should* be the correct resolution for use on CafePress.com if you are so nclined to make a shirt (I have never made one there but I used the T-Shirt template so you should be golden. Enjoy!
I plan on revising this to make the "Freem" more styalised but I won't be able to get to it until the weekend.
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