This baby discovered automatic sliding doors for the first time and truly embodied the phrase "childlike sense of wonder." Posted to YouTube by his dad, Abraham Vargas, the video shows the little guy seeing the doors open and losing his cute little mind. It becomes too much to handle, so he runs away only to run into—BOOM!—another sliding door!

Sure, there are charts detailing the different stages of infancy, etc, but there are only really two major phases in a child's development—pre-sliding door and post-sliding door.

Sources: YouTube: Abraham Vargas