Worst experience whilst driving

I once came to a squealing, skidding stop from 70mph in the outside lane of the M80 - with another car less than a car length in front of me but facing the wrong way. Another car was still spinning away, raining debris onto us and the HGV on the inside, which was also struggling to stop before smashing into a third car involved....

Someone swerved on from Cumbernauld junction between two HGV's in the inside lane, and bounced off the car in the outside lane, triggering a chain reaction.

New pants moment.

Fully laden arctic driving through a red light with no hint of stopping while I was driving across the junction.
I spotted him at the last second and managed to slam the anchors on and he barely missed me.
Certainly got the adrenaline flowing.

fitted a new boost controller in my Skyline, was fiddling with it on a dual carriageway and looked up to see an artic changing lanes in front of me. To this day I do not know how I didn't end up under his rear wheels but I managed to avoid him by literal millimeters.

Vomit. That's all I have to say on the matter.

Many years ago, driving an MR2, a lorry wheel (not tyre, but a full wheel) bounced down the motorway towards me. I didn't do anything as I was mesmerised by it.... it bounced over me, touching nothing.

Driving across Europe in an old 4x4, either Czech or East Germany, I forget.
Nose to tail traffic of trucks in the slow lane doing 50, which I was happy to sit in.
The truck behind me didn't like it, overtook, and forced me off the road when alongside.

Many years ago on the M23 coming into Hooley, riding my 2 week old ducati at stupid speeds, hit the seem between two bits of newly laid tarmac whilst leant over. Triggered a massive tank slapper for the entire length of that part of the M23, sitting me up and just missing a grab lorries wheels and then the bridge wall.

Leant the bike on the wall and sat contemplating life for about 20 minutes whilst being called (rightfully) a wker by passing traffic.

Driving along in the outside lane of the Oxford ring-road (between Wolvercote and Headington for those that know it) when all of a sudden the car in front of me swerved into the inside lane to reveal a lady in her mid-60s/early-70s, driving the wrong way down the dual carriageway in the outside lane. I swerved out of the way just in time to see her scowl at me as she went past (I assume she thought that she was in the right and I had been overtaking or something).

At the time I felt fine but when I tried to get out of the car when I got to work, the adrenaline suddenly hit me and I could barely stand on my legs.

I was bringing my wife home from a girls night in out 3 day old Focus when she suddenly threw up. Before I got the chance to stop, she had managed to splatter the dash and windscreen, made even worse as she put her hand over mouth to try and stop it. The rest of the drive home was very quiet ... Even though we got home at 1am, I got the wet vac out and cleaned up the mess, as well as disinfecting everything.
Proper worst experiences have been cars spinning on the motorway in front of me, which has happened three times over the years. Two were when the cars ahead braked hard causing the car in front of me to jump on their brakes, catch the grass next to the crash barrier and spin. Luckily, both times I was looking far enough ahead to see what was happening and leave enough enough room in case anything happened, which it then did. Scariest part was then sitting there for a couple of seconds while the spun car sorted themselves out and hoping nothing piled into the back of me.
The other time was driving past Gordano services in heavy fog, when a car swerved out from the slip road causing a couple of cars in front of me to brake hard and lose control. Being young and dumb I just floored it (as much as I could in a Metro GTA ) and go through the gap they had left. Luckily there was nothing in front and I continued on my way with a slightly raised heartrate
Nowadays I am rather older and supposedly more grown up, and ABS tends to stop so many cars losing control under braking. Worst experiences these days are normally needing the toilet when I have just passed the services

Encountering an utter lunatic in a pickup truck.

Back when I was about 24, I had a tidy little Renault 5 as my daily car. Coming back from my then girlfriends house (her in the car) a pick up truck pulls out on me and being a more fiery young lad I hit the horn, we exchanged gestures. Typical kind of stuff.

Except this guy went utterly batsh!t. I assumed we were done until we're coming alongside each other at a roundabout, me to the left going straight on and him going right. Firstly he brake tests me, then as I'm coming alongside he tries to run me off the road. I pulled in behind him, turned right as thankfully the road was clear and pulled up at the side of the road.

I've come to a stop to see a pickup truck accelerating at the back of my car and bang, he's rammed it. Long story short, we were fine, the car was written off, he got punched, I made a profit, his shiny new pickup was all smashed up and I learned that 50 something year old men can be some of the most angry on the road.