As evidenced by his many posts in r/stencils, my secret santa enjoys making his own t-shirts. The first design is a 60's style Batman logo modeled after this design: http://www.fashionising.com/clothing/b--Daily-discovery-Balmain-does-Batman-4024.html. The second shirt, which I couldn't figure out at first, is a design of a soot sprite from the movie 'Spirited Away.' My SS mentioned to me that he still has a few shirts in my size and may even be kind enough to send more designs my way. (Please.)