that is going to be the luckiest, burliest stick in the universe, with +5 dexterity. that is so unpossible it's not even funny. i've broken screwdrivers trying to open those bastards...while they were standing still!

i can see a stick getting tossed up into the drivetrain and derailling the chain, maybe even breaking it, but not popping the masterlink open. you just try opening one with an unmodified stick sometime, and let me know how it works out for you. the stick would have to get wedged between the ground, and the .8mm lip of the master link and pry it open without breaking...all that while the bike, and rider (a combined average weight of ~170lbs, moving at an avg speed of 15-17mph). now....catching 1 link out of 70 or 80-ish....that has about as much a chance of happening in the real world as trying to unlock a deadbolt by throwing the key at the keyhole at 3ft back.

motorcycle master links are a completely different story, they're like, 7 times thicker than a bike chain, and at least twice as big. bigger target=higher probability of a stick unlocking it, but even so, they're more covered, and being bigger, are a lot harder to open...i have a really hard time believing your "first hand experience."