Aaaaaand, my Horri-Bull's neck joint snapped off today.
I was being super gentle and slow with it while trying to add more pieces of blu tac to help support the weight of the bull head... and it just broke off like a piece of butter. I super glued to piece back on, and it actually feels more secure than before it broke. When I got the toy, I already noticed that there was a crack on top of the one remaining hook that holds the neck in place. Today, the remaining side just gave way. After I reassembled the neck joint, I noticed that unfolding the bull head exerts outward pressure on the joint. Combined with the load bearing of that head in robot mode, and over a period of 26 years, the plastic just couldn't hold.

Although it felt the same as experiencing GPS, I don't think it's the same. GPS happens just because the plastic quality is just inherently bad. Horri-Bull's problem is that the joint is just really poorly designed. The continual outward force and downward load just places stress on that neck joint. It's little wonder that there are so many headless (in alt mode) Horri-Bull's out there. Horri-Bull is just a horrible (sic) design, even by G1 Headmaster standards, and it's abundantly clear to me now why I skipped this toy back in 1988. My very first Headmasters were Apeface and Snapdragon, and tbh, all other Headmasters (aside from Fort Max) have paled in comparison.