Maybe the muscle relaxers help deal with the anxiety? I've heard that having muscles that are super relaxed and floppy can cause you to survive physical trauma you otherwise wouldn't. Like supposedly that's why drunk drivers so often walk away from accidents in which other people are killed. That may be BS though. It also might be irrelevant if you fall from above a certain height.
If I can sustain the motivation for longer than about 30 seconds, maybe I can look the info up.
Edit:
Results of briefly-sustained motivation:
1) The odds of surviving a long fall start getting really low after about 70 feet, although it's hard to say when they hit zero. There have been a couple of documented cases where people survived falls out of airplanes that were at altitude. There are a ton of variables involved that can tilt the scale either toward survival or away.
2) If you are trying to ctb, a head-first fall several stories onto concrete ought to do the trick.
3) Keeping your body relaxed and flexible might possibly improve your survival odds in a serious "accident." (Or a serious "on purpose." Whichever.) Again, there are a lot of variables to take into account, so it's difficult to say.
4) It's actually a myth that drunk drivers survive fatal accidents more often than the people they hit. If a drunk driving accident has fatalities, 65% of the time the drunk driver is among the dead. <--That statistic comes solely from U.S. data, so take it how you will.