Remember Karen X. Cheng? She's the woman who gave herself one year to becoming a better dancer, chronicling her progress and posting the results in this time-lapse video, which went viral.
The overwhelming positive response she got from the video inspired Karen and co-founder Finbarr Taylor to start up 100, a platform that helps people find motivation and support to accomplish a goal or learn a new skill.
The 100-day challenge is simple: you choose something to get better at for 100 days, and share a 10-second video of your progress ever day. There's the stuff you might expect, like a guy learning to play the guitar, a woman hitting the gym every day, a girl training her puppy to do tricks.
Then there's this woman, Cynthia, who was paralyzed from the neck down and learned to walk again:
