*The grin isn't conscious--Samus' attention is on more immediate things, but it's just so nice to be surprised once in a while. Someone else might have fought the sweep, and fallen hard; the Chozo warrior moves with the momentum Jim imparted, turning it into a kick that helps control her fall. She catches herself on bowed shoulders, legs poised above her, she twists to bring them down in a strike at where Jim should have ended up. If he's ready to turn things up, she'll certainly oblige.*
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