If you're feeling down for whatever reason, you should watch this video of strangers high fiving, caught on a GoPro rig. It's going to make you smile, and what's more, the first-person perspective rig is downright awesome.

Configured by Andrew Maxwell-Parish, it's not your run-of-the-mill GoPro helmet mount. Instead, Parish attached the camera to his arm so it's looking right at the person he's high fiving. An accelerometer panel on his arm tells the GoPro when to record. If you'd like to create your own high five cam, Parish has posted a how-to on Instructables. The video is a delightful watch, and about as close to scientific proof as we have that you can't turn down a high five. [Vimeo via FastCo]