Abstract photos using very shallow depth of field

I like abstract art and I like bokeh, so I decided to combine them. I put an extension tube to a 500 mm mirror lens and these are the results. Some people don't like ring bokeh, and I agree that it doesn't work well with some subjects but here it makes the photos mysterious.

Next is an abstract photo taken using Takumar 50 mm f/1.4 but reversed. Can you guess what is the subject in this photo? I boosted the colours a bit but otherwise, the photo is nearly untouched. The depth of field ended up really shallow and it made this interesting abstract picture.