Visible crew/equipment: When Annie Lansing is looking out of the back of her car to see if the hitchhiker is still running behind her, he has disappeared but instead you can see a crewmember through the upper left corner of the car window.
Visible crew/equipment: When the blob just misses Laverne, you can see a crew member under the raft (probably operating the mechanical special effect).
Continuity mistake: A display rack which Sam knocks to the floor keeps changing position. (00:17:45)
Continuity mistake: The amount of snow on Annie's windshield, after she awakes from her hit. (01:15:00)
Continuity mistake: The position of the hitch-hiker between shots, after Annie hits him, changes. (01:01:30)
Continuity mistake: When Rachel is on the raft touching the monster, Randy's stance changes between shots.
Continuity mistake: In 'The Raft' the angle of the car, and it's distance from the water changes.
Continuity mistake: Laverne leaves her sandals on the shore. In later shots they're gone.
Continuity mistake: As Annie shoots the hitchhiker, her necklace is alternately over / off her arm.
Continuity mistake: When Old Cheif grabs Sam's hair, the amount in his grasp increases. (00:30:45)
Factual error: Sam neglects to cock his gun before he shoots Old Cheif Woodenhead. (00:24:40)
Revealing mistake: When the elder Indian (Native American) with the black hat steps out of the yellow car at the beginning, and says hi to the shop owner, then Hi to the wooden Indian chief. You can see the Indian chief move slightly, indicating it is not a wooden statue, but a real person under the getup. (00:04:52)
Suggested correction: The scene where he moves is intentional. In fact, Old Chief Wood'nhead is played by Dan Kamin, and he moves a lot more later on.
Suggested correction: He does give a shocked look when he see's the statue move its head a bit.