Depends upon what one considers practical? I had some nice (here: both informative and entertaining) conversations with someone I'd consider a genius, not via the more evidently practical skill of juggling, but because we'd made each others' acquaintance due to a mutual interest in Rubik's Cube.
If you haven’t seen it, you may be interested in https://youtube.com/watch?v=q6AsllXpKBU, which combines solving Rubik’s cube with juggling (1 minute, 41 seconds per cube)
