It's an every day occurrence in London unfortunately. People park on sidewalks, cars parked down both sides of narrow streets with no room for cars to pass in opposite directions, you have to pull into gaps between parked cars to allow head on traffic to pass. In some places there you only have inches on either wing mirror to even pass through. If you've never been to London, you can't begin to appreciate the width of your roads here in North America.
In places where you have 20 mph zones because you feel like you can't physically get 2 cars past each other in North America, not only do you have traffic flow in both directions, the speed limit is 10 mph faster and everyone is still speeding.
There are places where if you don't park on the sidewalk, there isn't enough space on the actual roadway for traffic to pass... so people park on the sidewalk because "where else am I gonna park?"
This is everyday life in London, and people rarely even give it a second thought or bat an eyelid until someone gets hit, and then there's outrage for a day or two and then everyone shrugs and say "that's just the way it is" and goes back to their everyday lives.
Is this crazy? I guess it is, but that's London... and every other old world town in the country. Streets were built long before there were cars, houses line both sides of streets and so the roads can't be widened without knocking down hundreds or in the occasional place thousands of years of history. We take our heritage more seriously than our need for wider roads.
We all greatly over estimate our ability to drive and we all think we're the next World Rally Championship champion - because we all drive stick. None of those shitty automatics you North Americans love. When we drive, we want to drive, not cruise luxuriously on our floating cloud, cut off from the feeling of the road by soft suspension.
So imagine cars dashing through tight streets, with no room for two way traffic - even though it's a 2 way street, other cars parked close on either side, almost grazing your wing mirrors as you whip through and your only thought is I hope nothing comes the other way, the last place I could've let them pass was 400m back and I'd have to back up this bastard all the way back to there to let them pass.
Ironically, you have one of 2 states when you're driving on the circular road around London, our M25 motorway (that's what we call highways in the UK, motorways). You're either whipping along at 90mph (the speed limit is 70mph) 15ft from the bumper of the guy in front of you and the guy behind you 15ft from your bumper... all the way around the M25, or someone's had an accident and you're crawling along at 20mph wondering if you're ever going to get home. The 3 lanes of the motorway much of the way around is narrower than your 2 lane highways here.
The first time you ever drive in this kind of environment you feel one of two feelings - either trepidation, anxiety and nausea, or a level of indescribable exhilaration.
That's what driving in England is like. It's like an extreme sport compared to driving in North America.