We are going to handle our multiple bounce strokes differently than we handled our Legatos, Staccatos, Taps, and Upstrokes.
1) While holding the stick, and without breaking the wrist, lift the entire forearm a few inches
2) Drop the forearm and all of its mass to the drumhead or pad
3) As the stick hits the drumhead or pad, apply a little bit of pressure to the middle finger on the underside of the stick. Keep the ring and pinky fingers relaxed while MAINTAINING the fulcrum!
The amount of pressure you add to the middle finger will help decide how many bounces your stick will make.
In the case of "Infinity Bounces", we want our multiple bounce strokes (indicated by the fanned beams) to be as evenly spaced and last as long as possible.