Interesting 17 Pictures That Will Make You Say "Oh, That's How They Do That!"  

Kellen Perry
444.5k votes 79.7k voters 4.9M views 17 items

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.

1 39,422 VOTES

A Bricklaying Machine

A Bricklaying Machine is listed (or ranked) 1 on the list 17 Pictures That Will Make You Say "Oh, That's How They Do That!"
Photo:  Antmatter/Imgur
34,110 5,312
Is this fascinating?
2 43,294 VOTES

How a Log Is Divided Up

How a Log Is Divided Up is listed (or ranked) 2 on the list 17 Pictures That Will Make You Say "Oh, That's How They Do That!"
Photo:  HockeyDude3013/Reddit
36,861 6,433
Is this fascinating?
3 32,633 VOTES

Moving a House in 1908

Moving a House in 1908 is listed (or ranked) 3 on the list 17 Pictures That Will Make You Say "Oh, That's How They Do That!"
Photo:  JustBlue/Reddit
26,575 6,058
Is this fascinating?
4 28,628 VOTES

Changing Lightbulbs in an IMAX Theater

Changing Lightbulbs in an IMAX... is listed (or ranked) 4 on the list 17 Pictures That Will Make You Say "Oh, That's How They Do That!"
Photo:  phloyd47/Reddit
22,444 6,184
Is this fascinating?