Problem
You're in a foreign country, and nobody there speaks your language or any language you know. You happen to know that a major earthquake is about to hit, which will likely cause a tsunami; nobody else knows this but you. If you act quickly, you can get people to run to high ground, but all of your communication is going to have to be non-verbal. Using your knowledge of non-verbal communication, what can you do to save as many people as possible?