My only negative response to the toilet backing up is: "Oh, sh*t!" and a few other expletives.
The last real startle I had was December 31,1999, we were sailing our boat in Mexico pacific waters, and were anchored off a little island known as Isla Isabella. It is a bird refuge, and has hundreds of thousands of birds on it - nesting Frigate birds, Boobies - brown and green and blue footeds, faerie terns, sea birds; Kewl place.
I was waking back to the cove where we were anchored to wait for the others who were hiking up to the top of a hill. I took a "short cut" as I lost the trail in 6' deep grass. I took a step on some downed grass and...... Startled a 6' green iguana who shot out of hiding in the grass. She, in turn, startled the hell out of me. It was only the startle factor. I'm not afraid of much.
Moments later, I'm picking my way along, and I hear this clacking of a beak. It was a male frigate bird sitting on his nest. They have a wingspand of 7-8 feet, and a beak that is 4-5 inches with a hook on the end. He was clacking his beak in warning. I looked up at him and his beak was only a foot from my face!
I calmly started talking to him in a soft voice and told him that I didn't mean to enter his territory, that I was just passing through, and moved away as easily as I could. He just sat there listening to me out of curiosity, instead of alarm. (If I had reached out to touch him, he would have bitten me).
Last winter vacation in Puerto Vallarta in one shop I held a tarantula. Let it walk up and down my arms and hands. She like to be scratched behind the head. Dont we all? Kevan just couldn't look. He HATES spiders. They creep him out. Snakes are kewl, too.
To get my "thrills" I LOVE roller coasters! I scream and scream. Kids on the coasters think I'm weird - they're right! Great way to get any anxiety out and exercise the lungs!
On vacation a couple years ago we stopped at Lagoon Park outside of Salt lake City. They have 2 or 3 roller coasters. We went on the big one 4 times, It has 2 spirals and I visually blacked out on them due to the G-force. Great fun!
Ok, so I lack much in the way of phobias, except fear of falling, and just a little clostrophobia. It keeps life very facinating!
Hugs and screams