Hi Todd,
You certainly had the right idea. But as Slobodan pointed out, there’s no connection between the people and the fascinating wall. Had you waited for people coming round that corner in the opposite direction you’d have made the matchup. They’d be facing the artwork on the wall. Only problem is, you’d be able to see their faces, and it appears HCB’s France now has the asinine idea that when you’re out in public you have an expectation of privacy, so you might have ended up with a legal problem. Anyhow, good try, and you picked a great wall.