Following John Cena's extremely early return from a torn triceps last month at Hell in a Cell, you would be forgiven for wondering if the 36-year-old really is some type of invincible Superman-figure.
Certainly, his healing powers seem enough to make Wolverine go green with envy.
Of course, scratch beneath the surface and you'll find there's a little more to the story.
While the current world heavyweight champion has shown an admirable (or foolish, depending on how you look at it) willing...
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