Yep, I see it now. When I first saw it, it looked more like a tent, or "bubble". Enlarged, I can see the smoke. Hmmmm...
Given that this was on Congressional, on the 4th green, it can only be 1 of two things:
1) A reference to the 4th of July; or
2) A riot.
I hope was 1 but I fear it was 2.
Here it is enlarged:
You may be onto something Mio, I will have to go check it out.