Great thread Gumshoeye. I've experienced tachypsychia twice, both times while driving. In the first instance, a flatbed truck with dualies turned on to the highway ahead of my wife and me as we were accelerating back to speed after passing through Townsend, Montana. There was a fist sized rock wedged between the two right tires that launched at our windshield about the time we hit 40 MPH. It still plays out like a slow motion video in my head with the rock headed for the windshield of the Subaru right in front of my wife. I executed a 180 to the left with the wheel putting me instantly into the oncoming lane which was fortunately empty, then repeated the maneuver to the right as the danger passed to regain my proper lane.
The second time I was returning to Helena from Great Falls in the same car. As I topped the North Hill on I-15 to drop into the Helena Valley the highway turned suddenly white ahead of me. There had been a freak ice storm and six vehicles were stopped in the right hand lane and right shoulder immediately ahead. I popped it into 4 wheel drive and changed lanes but the car began to oscillate left and right. Again, it was all slow motion and I could tell that the next swing right would put me under the back of a 3/4 ton 4wd pickup/camper so I let it go into the median on the left hand swing. I was broadside to direction of travel and nearly stopped when the right side tires dug into some soft soil and the car flipped to its top in a heartbeat. Time returned to normal speed and I cranked open the driver's side window, braced myself against the ceiling, released my safety belt then eased down and crawled out the window none the worse for wear. This was '88 and pre-cell phone, but one of the gentlemen drove me to a valley market where I phoned in the accident report, then drove me home another few miles. The investigating MHP trooper called me at home a few hours later and I began to walk him through the situation. He stopped me and asked if there were other vehicles in the road ahead when I topped the hill (everyone had pulled away after my adventure to avoid a repeat). When I said there were he replied he figured that I must have been avoiding something as it was darn rare to see 4wd Subaru's upside down in the median. He then asked if alcohol was involved and I said "No sir, but there's a cold Ranier Ale waiting in the refrigerator as soon as we're done talking." He allowed as how he wouldn't mind joining me but had a long night ahead as I had been far from the only victim of the storm.
It is a very strange sensation to experience but can also be the difference between life and death if you're prepared to utilize the edge it provides when everything drops in the pot.