Hate to be pedantic...
erm, actually no that's a lie, I LOVE being pedantic, it's everyone else who hates it :)
Anyway back to my point, it's E=mc^2 (superscript 2, not subscript 2), and to be precise it is in that case (upper case E, lower case m and c) if I remember my physics correctly.
It is SO true though. Myself, I prefer Freecell, but there is nothing more anoying than someone trying to help you when playing solitair