If there ever was a totally USELESS exercise, it is the decline BB/DB bench press!! Don't you dumb-fvcks realize that all those big pec. muscles are merely going to SAG when you get older?! Declines, of course, build the lower pecs and what male needs more lower pec development!?? Ideally, do inclines and flat benches and leave it at that.
Training alone with inclines and flat BB bench presses are no problem in dumping the bar if you "get stuck". On flat bench, w/o a power rack available, I would just drop one end of the bar io the floor (relieving half the load), roll the bar down my waist, and then sit up...a little uncomfortable, but always a SAFE way to get out from under the bar!
How could anyone be so stupid as to roll the bar in a BB flat bench toward their neck in an effort to get out from under it!?? But there have been several reported "gym deaths" as the result of doing just this!
But someone would really have to not be playing with a full deck by trying to do decline BB bench presses with max. weights unassisted! However, in the 1980's there was a TOP-LEVEL U.S.powerlifter who was found dead in the gym with a 440 lb. BB resting across his neck as the result of attempting to do un-assisted decline BB bench presses! INSANE!!