Stop him from doing what? You have to see one first.
put bigfoot in the way
You pull the cap off the gas area
When you are trying to stop Gretchen Grimlock from taking Bigfoot, jump from your helicopter to hers, pull off her fuel tank cover, then cut loose the Bigfoot cage with your shears. You and Bigfoot float safely down on a parachute.
Bigfoot in this dream represents something the dreamer fears in real life. To stop the nightmare, the dreamer needs to stop avoiding the issue and resolve the problem. Once the dreamer no longer feels threatened, the nightmares will end.
After you have proven the existence of the Jersey Devil, and Nessie, and the Chupacabra, but not the Yeti, you get another chance when Bigfoot is sighted. But Gretchen Grimlock tries to spirit him away and you have to stop her and save Bigfoot. Get close to her helicopter, jump across, open her fuel cap, and cut loose Bigfoot's cage with your shears. You float down safely with the cage.
They never did. Bigfoot is a phony. They never did. Bigfoot is a phony.
No. There is no such thing as Bigfoot.
Bigfoot is not real!
Finding Bigfoot - 2011 Bigfoot and Wolverines was released on: USA: 16 December 2012
Finding Bigfoot - 2011 Baby Bigfoot was released on: USA: 1 January 2012
Finding Bigfoot - 2011 Bacon for Bigfoot was released on: USA: 13 January 2013
The existence of bigfoot has not been proven. Until it can be shown that bigfoot exists, bigfoot's planet of origin is both impossible to determine and irrelevant.