I've generally been fine.. but last friday I fell twice !!
I had a fall unrelated to a spook, my fault, off balance on a jump and my horse is head shy and I balanced on her neck.. bad. Well anyway - when I got back on and walked my horse through the same jump, she landed great but started freaking out because she remembered loosing me last time and me falling on her neck and how traumatic that was for her :)
My fatal mistake the second time... I pulled back when she started the bolt but then when she squirmed I did the classic knee pinch and leaned FORWARD to keep my balance. I just can't resist the fetal position yet!
And as you all know forward is a way out of your saddle... you need to lean back.. and pinching creates energy, not grippiness... these natural instincts which have kept us save for years are now our enemies.
Had I leaned back and not pinched w/ my knees, maybe... it would have been different? My instructor got on after that one and took my horse through the same jump. She acted similarly, started bolting and wanted to wiggle, but my instructor got her under control and did it again until she was smooth again and the horse learned that spot wasn't an 'evil' spot. And she did it w/o worry. So there is a way that works.
I suspect you've just learned to do more of the right things than the instinctual wrong things. I hope I can remind myself in that split instant should it happen again!