The thing that threw me off was the fact that every time I have ever viewed a contrail magnified I could always make out more than one point of origin (engine's) of the contrail. That and the dispersal of the gasses typically starts at a given point back in the vapor trial then tapers off more and more quickly farther back and then largely dissipates.
This contrail was quite a bit different from any that I have ever seen. It also gave a distinct single tube like appearance, more in line with what one would see from a rocket motor.
Contrary to this dolt named dedalios who thinks everyone but him is an idiot, this thing was odd enough, one-off enough, to have caught a lot of peoples attention and apparently, imagination.
Glad it turned out harmless, more or less