Aron Ralston -- the guy who cut off his own arm to free himself from a boulder -- just helped free his girlfriend, too -- from criminal charges.
TMZ broke the story ... Ralston -- the real-life inspiration for the movie, "127 Hours" -- and his GF Vita Shannon were arrested last December in Denver for allegedly assaulting each other during an ugly argument.
Charges against Ralston were quickly dropped -- lack of evidence -- but authorities went after Shannon ... for allegedly punching the one-armed man in the back of the head.
Shannon was in court Wednesday ... and Ralston didn't show up to testify ... so prosecutors dropped the charges.
'127 Hours' Amputee Aron Ralston
Helps GF Escape Long Arm of the Law
2/20/2014 12:30 AM PST BY TMZ STAFF
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