The mama bear was being protective, not aggressive. She was about to grab her cub by the nape of the neck and carry it to safety, away from the gravel berm beside the road.

Photographer: Allan Carrano
Camera: Canon PowerShot SX150 IS
Lens: Canon 5.0-60.0mm zoom
Data: 42.6mm focal length, 1/60s, f5.0, ISO 200
Cropped in post processing