Kelly Eull, a family law attorney in Minnesota, was next in line at the local car wash, so she pulled out her phone and tweeted:

Introducing #carwashlivetweet, the hashtag that says, “I’m at the car wash.” OK, we’re not really introducing it. The first instance of its use dates back to Dec. 17, 2011, when a guy named Alex Denham in Canada tweeted this:

Very deep stuff. But since the beginning of this year, #carwashlivetweet has gained traction on Twitter. The best, of course, was when somebody tweeted the video of the terrified little girl that we posted back in April. You can view the hashtag thread here.

(Photo: Screenshot/Twitter)

(Photo: Screenshot/Twitter)

Point is, although it’s not as popular as, say, #worldcup, using this hashtag and others can lead to incremental marketing gains. It’s all about getting people talking about the car wash and thinking about heading to the nearest one. Because ultimately, what’s good for the whole industry is good for you.