Happy Pi Day, geeks! We know Chris Hardwick is one of our favorite sexy geeks, and he’s just giving us more reason to love him all the time. In celebration of 3.14, here is @nerdist himself explaining the video “Pi” by Hard ‘n’ Phirm:

And the aforementioned Pi Song, in all its retro geeky glory:

(I love how the kids get tired and try to sneak away. Also, where can I get one of those totally rad shirts?)