"If it were to have been a slowdown and then return to rotation that event would not be the day the Earth stood still. "
In revelations and Velikovskys study of 'myths' the standstill prolonges one day/night depending where people were on the globe I was merely making the distinction between a sudden halt and a progressive 'braking' and then the reverse. How long the standstill was I have no particular opinion, other than to generally trust the eye witness accounts as they are conveyed down to us.
"Nothing in your post explains why the rivers and oceans are boiling. " I made no mention of the oceans boiling,[ though as massive as they are I would still expect them to warm by several degrees] as to the rivers it's to do with the Kinetic energy, and angular momentum of earths rotation, I don't know the physics but if something is travelling at 1000 miles an hour [setting aside the complex gyrations even a stationary object on the planets surface undergoes] it somehow possesses that energy within itself and forced to stop that energy gets expressed as heat. When the world slows the oceans which are held by centrifugal forces around the equator retreat poleward, but also head east. So one would expect the Pacific to head north east over north America and the Atlantic to do the same in Europe. These walls of water would show apparent acceleration eastwards as they moved north given the increased differential between their near-Equatorial speed of 1000mph [1675KPH] relative to slower surface speeds nearer the poles. Apart from this the Pacific would overwhelm Beringia. http://www.esri.com/news/arcuser/0610/nospin
Given the short duration of the event not all the ocean would get to the poles, and most of the evidence would be lost due to the almost equal and opposite flood of water returning south-west as the spin recovered.
My contention is that as the earth's spin increased again, the same physics would work in reverse, that is large bodies of water would rapidly cool, and the further south they reached the more rapid the cooling would be.
On this bathymetry map http://www.arctic.io/zoom/yDzd/0.5;0.5;1/Bathymetry
search the area south and west of Svalbard to find the parrallel tracks and resting bodies of 2 mountainous chunks of rock washed south in this returning flood. You'll find them west of the top of Norway. It's also worth a close look at the area north of Alaska and the erosion of the continental shelf there.