It's not whether the topic is handled, but the attitude towards the event, and the possible difference between terminologies. (In GURPSese, 'pinned' basically means 'grappled so hard as to be on the ground and unable to do anything without breaking free, and breaking free would probably take longer than the combat lasts, if doable at all'.)
But it also illustrates an overall difference of attitudes towards special attacks. My expectations are that they tend to be high-risk-high-reward if you know what you're doing (or at least hard to pull off but still high reward).