Here’s the position they were in when Chatfield pulled on McMichael’s arm to try and get him off balance.
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Two important things here:
1) Chatfield, as he initiates the pull, is in no position to put his leg across McMichael’s. In fact their skates are perfectly positioned for that
not to be possible, both in a hockey-stop position and parallel to each other.
2) McMichael is pivoting clockwise with his back foot. This becomes very important in the next split-second.
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This is where the leverage took hold.
Note that Chatfield’s skate position has not changed.
In this instant, McMichael’s entire body weight has suddenly shifted from his back foot to his front foot, causing his back foot to lift completely off the ice and his front foot to slide forward as it takes his weight. This is not “leverage move”, it’s a grown man’s entire body weight being physically lifted forward by his opponent.
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At this point, McMichael’s entire body goes ragdoll. You can watch a lot of hockey fights and never see someone end up in this position.
Note that Chatfield’s foot still has not moved — McMichael’s is sliding forward because he is being physically lifted for a split-second.
And, crucially, McMichael’s original clockwise inertia is now causing him to lean into the pull on his left arm, while his front foot continues to slide forward.
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This is where we run into a problem. Chatfield’s still pulling on that left arm, but once McMichael’s arm is fully extended his torso naturally needs to follow. You can see Chatfield fall back on his heels as the counterweight to his pull disappears. The inertia pivots both men on the only point which is still holding their body weights — their forward legs, which lock at the calf as they go into a flywheel motion.
Bearing in mind that this took place in a fraction of a second, I
really really doubt that Chatfield had a controlled plan for how it would play out. What started as a simple jersey tug to throw his opponent off-balance turned into his opponent lifting off into a pirouette, which kind of
had to be an unexpected twist.