Seen a similar video before. Like you said, not necessarily practical, but it's pretty cool! What is that extra piece on the rear handle of the saw? Never seen that before.
I was thinking the same thing as Walt ....... some type of secondary chain brake? Searched around the net a bit but could not find anything.
Trio brake saw. TrioBrake™ can provide extra protection in situations where a regular chain brake fails to provide adequate protection. For example, in the event of climbing kickback when pruning a standing tree, or if you stumble and risk injury from the saw. TrioBrake™ also provides additional protection when felling if you plan to bore and hold the saw horizontally. TrioBrake™ also helps you work in a more ergonomic, safe and comfortable way. The guard on the rear handle will let you know if you bend and strain your back instead of bending your knees when crosscutting. TrioBrake™ is also activated if you use the saw above shoulder height incorrectly, for example when limbing. TrioBrake™ also makes it easier to intentionally activate the chain brake when starting and moving.
