S9s
I cannot really help you with your query, but last month I bought a bike and nearly every shop I went into tried pushing a CB on me,
Was the pedal Tighten up enough ? did you check ?
Another thing are you alright ?
The first bike I bought did the same whilst I was cycling and it's still one of the most painful things that has happened to me on a bike, I still shudder at the way the pedal came off and I shot forward hitting certain parts of my anatomy against the handlebars