This is probably my favorite of German rabbit sayings. Combining the word angst and hase (rabbit) is a brilliant concept.
I don't know if the science is exact enough for the blurb to be true, though. I think the instinctual need to flee from other animals is fairly ingrained in a "flight" animal, especially since the rabbit is programmed to run itself to death.
Yes, to death.
If you pick up a rabbit, and hold it in the air, it will die of a heart attack. That's why you should always support the rear feet of the rabbit if you pick it up. Never dangle a rabbit.