Changing over South Oklahoma City, OK

The report, as filed

I was laying in my hammock on the back porch looking directly West, clear skies, no clouds, sunny evening. The sun was almost on the horizon and in the distance I could see what looks like a contrail illuminated by light (contrail approximately 45 degrees to horizon). Seen that a thousand times, but this looked different. I decided to get my Leupold binoculars and take a look. It appeared to be a small aircraft but appeared triangular...it was spewing out what appeared to some sort of liquid...as portions of it were clouds but denser portions were dropping...very similar to a plane dumping water over a forest fire...which I have witnessed many times while living in Colorado/NM. This was different as the craft was climbing vertical as it was spewing this whitish liquid. The contrail's base was flared and narrowed as it came closer to the craft. I decided to get my camera w/ telephoto lens. Went inside to get it...approximately 30 seconds...came back o! utside and the contrail and the object were both gone. This is the part I can't figure out. I watched it for about 4 minutes, viewed it for 30 seconds with binoculars, 30 seconds later it disappears. Never seen anything like this before. Object appeared to be several miles up. Rationally I thought perhaps a fuel dump over a populated area? I just don't know. Very strange. Witness elects to remain totally anonymous; provides no contact information. PD

Held as-reported from National UFO Reporting Center (record NUFORC #136236). Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.