In Hindu religion we believe that the universe is mainly divided in 3 parts. Above the earth - SWARGA, Earth it self with it's atmosphere, Martya and below the Earth Patal. Again these are sub divided to 7 each, the total being 21 layers or Lokas. It is also believed that some one from these Lokas are coming to see Lord Jagannath in disguise called Chhadma Besha.
Sl No--Loka--Believed to be present in the form or shape--During the Seba period they appear--Mode of action
1. Patalok- In the crowd with hising sound- Kaliya Dalan- Sevayat drops from the Singhasan
2. Talatal-Blind and Invalid-During any seva-Flower in hand