17 Pictures That Will Make You Say “Oh, That’s How They Do That!”

If you’ve spent any time lurking on Reddit’s mildlyinteresting, interestingasf*ck, or damnthatsinteresting subreddits, you’ve seen them: those pictures that make you slap your forehead and go, “So that’s how they do that!” They’re pictures that give you a behind the scenes peek at how common things function, are assembled, or are maintained.

Below are just some of the most interesting pictures of this kind, from Reddit and beyond. Vote up the ones that blew your mind at least a little.

A Bricklaying Machine

How a Log Is Divided Up





Moving a House in 1908





The Inside of a Bowling Ball





Changing Lightbulbs in an IMAX Theater





Noodles in Taiwan





Harvesting Carrots





Episode V’s Opening Crawl





Maintenance on a Scary Bridge





Strips of Bark with Corks Punched Out





Cleaning Lincoln’s Ears





Inside of a Cheap iPad Case





Forming Springs





Making an Ice Rink





De-Icing an Airplane





Inserting a Doll’s Eye





Scoreboard Maintenance