Sometimes a grid keeps something in or something out.

A spherical grid keeps circus performers in — at least for a while.

Circus bikers circle the grid.

A double grid holds one of the Knoxville Zoo’s prize red pandas inside its habitat.

Pretty hard to see this red panda protected by a grid of fences at the Knoxville Zoo.

And a “gridded” duvet seen in a downtown Knoxville loft — open and on tour — just might keep the owner snuggled in bed a little longer.

Black and white decor in a loft bedroom in downtown Knoxville

For more grids and gridlocks, check out Weekly Photo Challenge: Grid right here.