Here's a bit of photo manipulation that could offend the purists...
This sun-lit flower was a real beauty in the early AM slanting light. And, although I didn't have a macro lens with me, I thought the plastic fantastic could do the job acceptably well. But a terrible, distracting sign behind it ruined the shot.
As if by divine interference, the wind blew a small white plastic bag by my feet.
Voila! My new background.
Now, the bag draped over the sign (something about 'don't cover this sign' IIRC) was a bit wrinkled but a wider-aperture should blur that nicely.
Yes, I later removed the bag.
K-5, DA 35mm f/2.4@ f/5.6, 1/800s (wind), ISO 80, -0.3EV.
Ron

[gjtoth]

Any port in a storm, Ron. Nice save!

[jmerchant]

Aside from the missing cover in the lower left, I think it worked out great!

[charliezap]

A nice capture and innovation Ron.--charliezap

[sireddy]

Great. New camera gear to pack. A trash bag.

[jmerchant]

Great. New camera gear to pack. A trash bag.

hahahaha

[rbefly]

Thanks to Gary, Jon, Charlie and sireddy, I appreciate the comments!
It was just a spur of the moment decision and luckily it worked out OK. But there have been many times (especially after a shoot, viewing on a monitor) when I wished there was some auto-background button I could press in PP. It's too late, then.
This one I caught in time and providence brought me a solution.
@Jon, you're right, I could crop it slightly tighter and remove that dark part.
@sireddy, funny thing is, I have plastic bags stowed in my larger camera bags, just in case; most of my lenses aren't WR. But on this day all I had was the K-5 with the DA35 attached and a CPL in my pocket.
I guess backgrounds are where you find them!
Ron

[Sailor]

Ron - an excellent field expedient - your mama didn't raise no dummy.

Jer

[rbefly]

Thanks, Jer! Once in a while the ol' brain cells respond correctly. Not always, though.
Ron

[jmerchant]

Honestly, I might be being a little nit-picky with the bottom left. Maybe it comes from knowing what the background is...