Hinges can be totally ineffective on dead trees, as they can snap or disintegrate before performing their job. I've had the plunge method of felling result in a barber chair before. I was experimenting with some tricky scenarios and staying out of the way, the holding tab simply failed . I would only use it in certain scenarios. Two of the biggest dangers when felling IMO is not cutting a clean apex in your notch, and cutting through your hinge by making the backcut too far above the apex of the notch and not paying attention. ( i guess not paying attention would be the biggest danger)