A week ago three people died while they were walking down Swanston Street. One was a French research fellow at Monash. The other two were a young brother and sister on their way to the footy. I published a post about the wall that collapsed on Sunday, gathering together what I could find from publicly available web pages. I didn’t expect the level of reaction I got. I was contacted by all sorts of mainstream media outlets, many in search of speculative comment. My investigations were made not because I consider myself an expert in walls and wind, but because I knew how to do it relatively quickly, and because I wanted to do something.