Hangups are where lots of newbies come unstuck with close calls, best way to drop a hang-up is by bowling it off with another tree, posting down a fat trunk at chest height is a big hassle and your trees are smashed and broken up top and if there's dead stuff up there then lookout. Stuff comes down fast to smash you over in a blink. Post down vertical hangups with angled cuts that let the log slide.
Getting hammered on the head by widow-makers isn't fun and you take full blame yourself for not staying wide awake. Gravity accelerates things at you faster than any drag car, the 0 to 100 mph stats of anything falling are phenomenal, but it's still your own fault for not looking up and sussing it first, chaps or no chaps