Well so for example I just drove through the Smoky Mountains earlier this month and when going down steep grade on a 2 lane campground road (speed limit probably 25), Id have the X in 1 (it’s an auto) and would very easily gain speed because of the weight and quickly get to 20-25 mph and about 3k rpm, so I’d end up going into 2nd to avoid any damage to anything because I wasn’t sure what it could handle, ultimately whether in first or second I seemed to gain too much speed for it to be safe for the X and would end up on the brakes which just kind of defeats the purpose of using low gear to me. But yes I’m familiar with that style of braking, mainly save mine for turns on windy downhills like that