Thai photographer Benz Thanachart figured out the best way to capture odd, surprised expressions on public transportation. All you have to do is yell. His project, titled Smartphone, is a compilation of photos taken after he yelled random phrases at people on the subway train. He would yell things "Fried egg!" instead of "bomb," "fire," or "gun" so that he wouldn't get in trouble with the authorities. The photos show that his method worked.

[via Petapixel]