The assumption of risk bumper car case was discussed here. A doctor seriously injured her hand when she was hit from both the rear and the front.  Head on collisions violated the park’s bumper car rules. In that discussion, the intermediate court had refused to extend the “no sports duty rule” to a non-sport

When someone is injured during a sports activity, the one who caused the injury will likely raise a defense called "assumption of risk". The wrongdoer argues that he’s not to blame because the law didn’t require him to protect the participant from the particular risk of harm involved in the claim. Whether the doctrine applies