Adam Back looks upset.
The hilarious part is:
"
Alas I own not a single bitcoin which is kind of ironic as the actual bitcoin mining is basically my hashcash invention
" - Adam Back 2013
This guy is the biggest mystery of all of Bitcoin. How can you try and preach to everyone how Bitcoin should be run when you own 0 bitcoins, and thus, don't even participate in it's economy? He doesn't appear to be living in poverty, so he's either:
A) Lying for tax purposes
B) Economically boycotting Bitcoin for some unknown reason
C) Waiting to "buy the dip"