i was a propl at odio and i taught him java script and we were working side by side, then he went back to stanford and what impressed me about kevin is he did love photography and kevin is someone who when he loves something, when he wants to build something like say he wants to build a photo filter he go into the chemistry of it and try to understand the chemical principles and recreate that in software. and just that passion and amount of craft that... the pride you take in your work to do it the right way that creates great things. that's what sold me. before i even sold a product i'm like kevin is just an amazing craftsman and he ll build a company of crafts people and that's what we try to do with square and twitter as well. we love our work. >> rose: kevin just sold to facebook. >> he just sold to facebook. it makes sense facebook would pick it up. facebook's core competency photos. but facebook is known for the past tense. photos are in the past. they're in albums. they're something that you have to maintain. instagram represented the now. it represented the present. it represen