rust

well ya it's rust! but what IS it?!

Table underside?

I see a tire in the background on the top right of the picture.. hhmm.. but still I'll got with the "table underside" as rbsgrl

Nope, not a table's underside!

A species of grass (weeds) dry?

really?

Sorry, is this off theme ?

No, author not off theme. Unfortunately some comments are not helpful and serve only to discourage members. I like your photo it is really cool, I like the colors!
As for the guessing, it is smoke with colored lights in the background?

rbs, i didnt mean to insult or make him/her feel any discouragement. it's actually really obvious to what i see in the photo, smoke with lights, not really the ideal entry for a "what is it" contest, hence the fact both you and i knew what it was. author, perhaps capture a photo that is more complex? something strange in texture or color, give us a challenge! best luck

You're BOTH wrong! It's obviously the trail left by the Tooth Fairy!

No insult taken, all comments are welcome. Yes there's smoke and candles in the background. I shot this in the Easter time. I like how it turned out and that's why I posted it, I know it's pretty obvious.

you lit your monopoly board on fire?

For the sake of photography

The shoe?

LOL! Nice one!

Fun shot... dolphin on its side