It turns out abstracts are easier to come by than one might originally think. There were two in this week's archives already before even starting.
To the left, a campfire. Can't get much more abstract than that, as the unpredictable flames are doing whatever they want to do during this long exposure. Typically, shots like this will have a shutter speed of at least a half-second with whatever stabilization is around (this time, my knee) and the results will be what they will be.
Center is Brando's guitar, itself not all that abstract, but the mother of pearl part is very cool and I took some time trying to get shots of it. I liked the combination of straight lines, regular curves, and random chaos represented by the strings, the hole in the middle and the decorative piece, respectively.
The next one was done intentionally for this challenge. We spent some time hanging pictures this weekend, until weakness and lethargy due to illness took me out of commission. At any rate, the phone with the leveling app was placed on some crumpled tin foil, and some nails and picture hangers were tossed onto the (recently cleaned) screen, so the arrangement is random. An object was placed under the foil so the bubble level would be just a bit off-center, adding hopefully a wee bit of interest to the scene.