Just when you think school officials have banned everything, they target cartwheels.

A school in the northern Ontario town of Callander, not far from North Bay, has issued a draft handbook of playground rules for the 2017-18 school year – and among the prohibited activities is the common feet-to-hands-to-feet flip.

No reported injuries prompted the ban, said Todd Gribbon, principal at M.T. Davidson public school.

“The activity can cause concussions, and neck and wrist injuries,” he said.

Gribbon said the school handbook is in draft form and the safe school advisory committee will meet Oct. 2. to review it.

However, the 14-page document doesn't offer an opportunity for feedback. Parents and students are required to sign a code of conduct sheet and return it to the school.

It’s unclear whether other Canadian schools have banned cartwheels. But they’re not permitted at some schools in Britain and Australia.

A Toronto school made news recently when it banned all balls from its premises after a parent who was hit by a ball suffered a concussion. A few schools in the U.S. have banned footballs, soccer balls, baseballs and lacrosse balls.