This one is not in and of itself ridiculous, I admit: It's a big solid coat which I inherited from my Dad. It's enormous solidity isn't necessarily coming across in the photo, and I don't wear it out that much - even in London you'd need an actual snowstorm. Cycling in it might well end up with a 2D bike.
I did wear it to NYC in July 11 years ago - now that was ridiculous. Actually that reminds me of its other function, now largely lost to me - it makes sleeping on people's floors far more doable.