Hockey (beer league ice hockey, and street), soccer, sprint triathlons.
Wrote some demo software to coordinate a stadium full of everyday phones as a giant display (think: "the wave" on phones), in 2010.
Registered a domain (crowdflare, at the same time cloudflare got registered, and got some interesting inquiries).
Considered productizing.
Got serious, went to Apple, instead.
Once occupied the floor beneath this bowling alley, in an office next to Bjarne.
Wrote a detailed letter to the CEO and EVP of HR for a multibillion dollar corporation, insisting that all parents receive equal parental leave.
Next day, the EVP of HR resigned, and within a few months, the parental leave policy was revised to be equal for all.