When I was learning to drive I’d have to go through 2-3 roundabouts just to get out of the residential area I was in so it was hammered in pretty early to always use signals, but there was one roundabout that was always a pain to navigate. Two-lane roundabout, those can always be a pain to navigate but lane markings were good so if you entered the roundabout in the correct lane you’d be naturally guided to your exit.
The problem was that coming in from the nearby motorway you’d have the innermost lane signposted as the 4th exit, practically a U-turn, and the outer lane was “all other traffic”. Even better, that signage was only painted on the road itself so if there was a queue or just a car too close in front of you you’d easily miss it. Inevitably anyone taking a right turn (3rd exit, think left turn in most other places) would only realise at the last second they were being guided to the wrong exit and they’d swerve in front of you, if you were lucky they might signal for half a second first. I commuted to work by car at the time and dreaded that roundabout every trip.
The best part is if you took the next exit which you were being guided to, it led straight into another roundabout so you could make a U-turn with absolutely no risk. If you were in the wrong lane you probably weren’t familiar with the area so you wouldn’t know that was there… But then after that was a retail park so you could clearly see all the parking space and know you could turn around there anyway! Some people would rather crash than take a minute or two to turn safely.














This is getting well outside my area but my understanding is that if you were approaching the center of the earth gravity would gradually decrease until you have effectively no net pull at the core. This is because the mass above you is still attracting you too so at the core you’re pulled equally in all directions. Using the same principle you’d essentially be free-floating if you found yourself in a hollow “shell” planet, presumably because the pull from whichever area of the shell is close to you is offset by there being more shell pulling you away.