Unusual but reasonable. "Bent _away_" isn't common or idiomatic. It suggests a more extreme posture than "lean." The use of "bend" for body position is common enough. "bend down," "bend over," "he's so flexible he can bend himself into a pretzel" are natural. There is an old-fashioned pairing, "to bow and bend."

It's not common, but writers expand word usage. It communicates the idea.