in a slapper, another benefit of gassing it: even if the front wheel does not lift, it will cause the rear end to squat, effectively increasing the rake angle. The greater the rake angle, the more inherently stable the system becomes.
If the steering rake is zero degrees off of the vertical, the bike has neutral equilibrium. (a ball on a flat plane)
If the steering angle is positive, the system has stable equilibrium (a ball in a bowl)
If the steering angle is negative, you are in a constant state of unstable equilibrium (think of a ball balanced on top of an inverted bowl)
The lower the rear end, the greater the rake, thus the more damped the oscillations become.
This is why when people do “stoppies” it’s VERY easy to get “shakes”
EDIT:
