Why does Jim gain the awe and respect of all the slaves? (CH 1-6)

All the slaves are interested in witches and talk about them all the time. None-the-less, Jim was the only one who'd had an interaction with them, and he was looked upon with awe.

And next time Jim told it he said they rode him down to New Orleans; and, after that, every time he told it he spread it more and more, till by and by he said they rode him all over the world, and tired him most to death, and his back was all over saddle-boils. Jim was monstrous proud about it, and he got so he wouldn't hardly notice the other niggers. Niggers would come miles to hear Jim tell about it, and he was more looked up to than any nigger in that country. Strange niggers would stand with their mouths open and look him all over, same as if he was a wonder. Niggers is always talking about witches in the dark by the kitchen fire; but whenever one was talking and letting on to know all about such things, Jim would happen in and say, "Hm! What you know 'bout witches?" and that nigger was corked up and had to take a back seat.