My 1953 Chevrolet's normal braking mode was fading, heh, heh. Lousy brakes. Considering the way I drive, I am lucky to be alive today.
It has been quite a while now since I experienced fading.
However, several years ago, I did on my 2002 Sienna.
In Mexico, the only effective way to control driving speeds is to put topes (speed bumps) wherever they absolutely completely have to go slow. In one 51 mile drive from my house to the Sam's Club in Tehuacan, there are 63 topes, more than one a mile.
Between Tlaxcala and Puebla City, there is a low speed highway, four lane divided. Every half mile or so for much of this highway there is a tope.
I had driven in from the border in my 2002 Sienna, and I was getting tired of constant topes. So, I started doing what everyone else was doing. Go over the tope, and accelerate full throttle to the next one, and brake heavily at the last possible instant.
Suddenly, with no warning, I had almost no braking power and actually went over the tope at too high a speed. It has been so many years since I had experienced fading, that it took me a while to understand what had happened.
That highway would be a darned good brake testing course.
Need I say I backed off a bit on my speed? It has never happened again.