At least thirty or forty years ago I read a short story in an anthology of science fiction. The story was about a man in a bazaar/market on some far-flung planet. He buys a rug/carpet. In the course of the story, the man lies on the rug and falls asleep. He finds himself in a deadly world/dimension. If I remember correctly, the grass in this world was either vampiric or acidic. Everything was deadly. He wakes up just in time to save himself from death. Does anyone recall the title and author of such a story? I believe that the protagonist portrayed by the author in other stories as well.