From the BC Squatchers youtube channel:
Returning to the river with salmon, the fellows find an assortment of sasquatch sign, but it is the outstanding warning wood knocks for which this video is named. Sasquatch sign includes snap offs, structures with sticks delicately balanced, sticks impaled in the ground, arched and leaning trees. It was skipping the trail and going the BC Squatchers route that yielded results again. With the sentry sasquatch's thunderous knocks at our intrusion, it meant two things. First. a real live sasquatch had an interest in our presence. Second, there were other real live sasquatch in the area.