Possibly, but I've seen the Mythbusters guys show how its done and seen some reliable internet sources confirm it.

I have to give him a lot of credit for standing up and saying, "That's it." Takes a lot more of a man to admit he's finished after he's tried his best and failed than for someone to fake it (Bear has his 'raft rescue' off the deserted island.)

This was only the second "Survivor Man" episode that I've seen, but I am definitely coming back for more. Loved how he scrounged for useful items off the truck.