This one wasn't weird per se, just unusual. Unfortunately it was impossible to take a decent photo because I didn't get my iPod Touch out of my pocket and unlocked until the light I was waiting for was green, so I had to take the photo while turning left with drivers behind me. What's pictured is a bus-stop billboard from Southern California Edison saying to never release metallic balloons, something that I'd never seen a PSA for in the past. I was going to replace this blurtastic photo with an image of the poster from SCE's website, but I was unable to find one. In any case, the caption says something close to the one in the thumbnail still from SCE's 2017 Safety Campaign - Mylar Balloons YouTube video, and uses the same imagery:

BTW, there was an amazing video I saw several years ago where a huge bunch of mylar balloons was released (at like a backyard wedding or something?), and they flew right into power lines, causing an incredible, giant, ultra-white explosion ("power flash", to use the storm chaser terminology) as wide and tall as the spread-out bunch. Unfortunately though there are lots of good mylar balloons vs. powerlines videos on YouTube, I can't seem to find that one with the massive bunch. It's feasible that I saw it on "America's Funniest Home Videos" rather than on YouTube. Anyhow, if anyone knows where to find that video or a similar one, please email me via the link in this page's footer so I can feature it here. Thanks!!