Has the Earth ever tilted so that it flipped nearly completely over?

http://www.grazian-archive.net/quantavolution/vol_04/lately_tortured_earth_04.htm

Could the Earth have even turned over completely without interrupting (interrupting very little) its spin or its magnetic field? The geographic poles would be reversed, and along with them the magnetic field. The Earth could not perform such a movement without an external assist, whether from an upsetting explosion of gases from the Sun or from the attraction or repulsion of a large passing body.

According to Warlow, who has however been challenged by Slabinski, the transaction could be relatively delicate; it would amount to the drawing of a force along the Earth's path that would cause it to tip over while containing its spin, in the manner of a tippe-top, a toy that is weighed on top and set to spinning on the board; the top turns completely over continuing to spin all the while in the same direction, North becomes South and East becomes West [8] . The motion performed is technically a fast precession.

A moment's reflection will rid us of any notion that the action would be harmless. The atmosphere, hydrosphere, and lithosphere would be agitated and produce effects that by any measures would have to be called quantavolutionary. For instance, it appears most likely that the widespread sudden destruction throughout the northern regions of the mammoths and other large mammals occurred in conjunction with a tilt of the Earth's axis in the presence of the exoterrestrial entity causing the tilt. We can say this because a sudden deep vacuum freeze, asphyxiation, thrusting of masses of gravel and bones, and permanent cold ever thereafter, such that the animals are sometimes found still fleshed-out and diagnosed in certain cases as heart-failures or with blood-clotted lungs, must indicate a holospheric event comprising an atmospheric and aquatic withdrawal, the descent of an extreme coldness, and upon the passing of the body, returning tides of water and wind to accomplish quick burial under muck, ice and tundra.