Doing a Joe Hawley describes One of Two things:
1.
Posting a cryptic and worrying picture or caption on social media, most likely pertaining to an event that happened in your life, and when
people ask and get concerned, taking it down minutes after.
2.
Reversing a song,
words, or phrase backwards, making it
hard to hear.
This action derives from the guitarist, Joe Hawley, From the band Tally Hall.
See Hawley-esque for more details.