Here are the how it works...
Person one will post a picture of soemthing on fire and say what it is. It can be anything.
Person two will post a picture of something on fire that starts with the last letter of person ones item.
Example.
Person one posts a picture of a hat on fire. Person two could post a picture of a train. Person three could post a picture of some narcotics on fire. ETC.
A forest on fire.