Introduced in 2014 it became quite the trend in 2015: Arm knitting.
Here's the most used video tutorial.
Things to keep in mind:
- The first time you arm knit you might take 1 or 2 hours to make a scarf. Once you get the hang of it, it goes a lot quicker.
- Take a bathroom break before you cast on. Not very handy to bring all that knitting to the toilet!