It's ok, I have a car analogy for hysteresis:
So, my first car was a 92 Plymouth Laser RS Turbo. It had a (rudimentary) cruise control system that wasn't quite capable enough for a turbocharged engine. The problem was that cruise control behaved as if throttle input was linear, but a 90's era turbocharged car is the very definition of non-linear throttle input. Thus, any time cruise was on and you hit a decent slope, the system would begin to oscillate. When the car slowed from climbing a hill, cruise control would apply more throttle - but then the turbo would spool up and you'd overshoot your desired speed. This caused the system to sharply back off, causing the turbo to slow, power to drop, and thus speed to drop too rapidly. The car ended up stuck in this long loop of "too slow, too slow, more gas more gas more more mooooOOOOH CRAP TOO MUCH TOO MUCH OFF OFF OFF WAY Ooooh that's better, much better this is nice, I'm right on, wait, no no no wait too slow, too slow more gas more more MOOOOAAAAHHHH TOO FAST TOO FAST..." which could sometimes last for miles, unchecked. That's a car experiencing hysteresis. The solution was as simple as very brief and very gentle throttle input right as the system started to back off too much. You could keep the turbo spooled and nail target speed for just a second, and then cruise could simply hold the throttle for you... until the next hill. Fortunately for me, I was young at the time and not quite as interested in cruise control as I was in long 3rd gear pulls while passing people on a two-lane highway.