Check this out
A man in England was sledding in a Kayak when police approached with riot shields. The Kayak sledder worried he had broken the law until the policemen turned their shields into sleds. A video made its way to YouTube. The police chief wasn't amused but admitted that snow brings out the child in every one.
Cops Scolded For Sledding On Riot Shields : NPR
Here is the only video I could find.