you can actually hold a right hand seb in the left hand, and catch the lug with the nail of the index finger, and if your knife is in proper maintenance (ie. lubed/greased, not run dry) you can flick it open (not a wrist flick, pure finger). the top right corner of the nail should be touching the blade, the flesh of your finger should be lightly pressed against the bottom part of the C cut out under the lug. and the rest of the nail should be pressed against the lug. where the period is on the really bad diagram below is the part that should touch the blade.
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the knife should have the frame lock facing you. try this on an axis lock, the same method will work. it is relatively easy once you get use to it. of course, inlays help with the grip needed to open it this way.
if you can't figure this out, let me know and i can try to take a video of it.