Out of this world! A massive, 100-yard-wide spinning ice disk in Maine sparks theories of hidden UFO tech beneath the river.

A strange-looking disk of ice is creating a stir in a Maine city.

The naturally occurring disk formed over the weekend in Westbrook, Maine on the Presumpscot River, drawing curious onlookers to investigate the strange sight.

‘It kind of looks like a crop circle,’ resident Doug Bertlesman told the Portland Press Herald.

‘It’s pretty wild to look at,’ he said. ‘It’s certainly not every day that you can watch a spinning circle of ice in the river.’

The naturally occurring disk of ice formed over the weekend in Westbrook, Maine, a city just to the west of Portland

The naturally occurring disk of ice formed over the weekend in Westbrook, Maine, a city just to the west of Portland

The disk spinning counter-clockwise on the Presumpscot River is an estimated 100 yards in diameter

The disk spinning counter-clockwise on the Presumpscot River is an estimated 100 yards in diameter

Residents joked that the the phenomenon looks like a 'frozen crop circle' or that it was made by 'space gremlins'

Residents joked that the the phenomenon looks like a ‘frozen crop circle’ or that it was made by ‘space gremlins’