According to Bali Hindu’s the offerings placed on the ground are called Segehans. They are believed to keep the demons at bay and contain petals, rotten food, are sprinkled with holy water. Most importantly they hold Dupa, an incense stick, as the smoke sends the essence of the offering to reach the demons. The demons are believed to be quite gluttonous and can’t tell the difference between good and bad food. If you happen to step on one it is not a big deal what is most important is the ceremony behind actually placing the offering out on the ground for the demons. This is done morning and evening, Bhuta and Kala are the demons and you can see them as statutes in all the temples, these offerings are placed on the ground as this is thought to be the most impure part of the earth as opposed to other offerings placed up high off the ground.