Sit on the side of the plank. Put the gum on your shoes. Hop off. Your shoes will now stick to the surface of the water, preventing you from sinking. Walk home.
Bonus: you now know how it feels to chew 5 gum.
Your helicopter is losing altitude quickly, and you are above a forest.
You have a comb, a magnifying glass, a melted stick of butter in your pocket, and a hula hoop.
How do you live through the situation?