What if we asked you to throw your expensive smartphone high up into the air, just for the fun of it? You’d probably tell us to take a hike. However, thousands of phones get tossed into the air and put at great risk every day, thanks to an app designed for just such a purpose. In our opinion, this may be the greatest (and most devious) technology prank of all time.

The addition of the smartphone to every consumer’s repertoire has been great for enhanced productivity and accessibility, but it’s not all bright and sunny for everyone’s favorite mobile device. While productivity might be on the rise, manners seem to be in decline, thanks to people not knowing how to properly use their smartphone in public without annoying everyone around them. Here are four smartphone etiquette tips that every device owner should keep in mind.