Very timely. I was on the CS7 last night at a set of red lights, a guy on a push bike was taking a photo of the cycle box in front of the lights. Half of it (and the end of cycle lane) was filled by a double decker bus and the small gap left was blocked by a motorbike. I managed to squeezed through and sat in front of them both before it dawned on me what the other push bike rider was doing. Apologies to the photographer if you are on this forum.
I wanted to get to the front to practice a trackstand but the lights changed. Oh and so as to not go off post, I do look over my shoulder, often, usually to see if there another flippin' motorbike in the bike lane.