A family of three were rescued after six days lost in the woods, by signalling a searching helicopter using the reflective screen of a dead cell phone and the blade of a sheath knife as heliographs:

Three Lost in Oregon Used Knife as Signal

In another interview, they explain that they would never actually have eaten the dog.

Very clever! And, yay for not eating the poor dog!

That's what you learn from MacGyver: always carry a good map when you're travelling!

And KNOW HOW to read your map and compass...


(And not to forget that you can always patch your leaking hot-air balloon with the aforesaid map and your faithful ol' roll of duct tape !!!).

Or GPS.