That is so cool! For most folks, I think, its just, "go buy a saw from Home Depot or Local hardware store and read the instructions..." That isn't really enough!
One of my dear friends had the great misfortune to have a saw kick-back on him when the tip caught in a bind and he had his forearm sliced in half. He did have the good fortune to be near one of the nations top shelf "trauma" ER centers so had it reconnected and has much of his hand/finger function back after years of therapy.
That was, for me, 20 years ago... I've never forgotten the day I heard the news. He was merely clearing tree limbs that had fallen on his property a few days after an ice storm. And he was/is such a competent, strong, mechanically oriented guy... but - "spit happens" when you least expect it.