Flight Simulator Keyboard Controls - Google Earth User Guide
Found this fun little easter egg in Google Earth. Press ctrl+alt+a or apple+alt+a to enable the flight simulator. After that, it will be available as a menu option.
It's really just a fun way to explore the world. It's google earth with a little HUD graphic overlay and some movement restrictions, but it's quite entertaining.
Google earth is free, and it only works on the client version (not the online version). The link above is to the controls to the flight simulator.
I kinda wish the crashing was more spectacular, but you can't have everything.