I have never used a one rein stop. Im always afraid itll cause a bigger wreck than a runaway. Taking a horses head away wont always stop a bolt and in that case you are riding blind freight train instead of one aware of obstacles.
(In fact the first couple of runaways I had as a kid I implied the "figuratively crap your pants method" and completely froze or yelled and screamed and hauled.
As I have become more skilled and more confident bolting and runaways are rare to none. But on the rare occasion one has occurred I have found it more useful to keep my head and not haul on the reins. If in an area where it was possible I would simply ride it out or spiral to reduce speed using heavy leg and rein cues. In a truly dangerous situation I find it wiser to bail first and track the horse later.
Even more effective is finding the root cause of bolting and desensitizing your horse to it or avoiding it all together. Also always riding with a partner when on a horse known to bolt is a smart idea. An ounce of prevention is worth a pound of cure.