Since God necessarily exists and necessarily has certain properties, nothing that is incompatible with God's existence is possible. In this sense God is a delimiter of possibility.
Madness string 1932
On playgrounds, there was always the spinning gate. It was a gate on a pole. You'd stand on the back of it and kick off like a skateboard and just... spin around on it. Think a merry-go-round, but smaller and crazier.