The Liberators Episode Two: Never Seen That Before

Hello. Here's your second episode of The Liberators. JetTail was just hanging about in a park when one of his friends came up to show him a mysterious ring-like dust circle in the lake. The question lies in. Who or what has done such a thing? First, they reach out to Liam, a friend of his, to have a look. As soon as he comes back with him, the dust disappeared, leaving a lump on the lake bed that exact same shape. He, too, wasn't sure, so Liam goes to his friend, Kennedy, for whom he doesn't quite know the answer either. But, it's lucky JetTail's brother, Mars, came just in time to help solve the mystery. What do you think caused this strange phenomenon? We hope you enjoy it.