static bounce(t: number): number {
    if (t < 1 / 2.75) {
      return 7.5625 * t * t;
    }

    if (t < 2 / 2.75) {
      t -= 1.5 / 2.75;
      return 7.5625 * t * t + 0.75;
    }

    if (t < 2.5 / 2.75) {
      t -= 2.25 / 2.75;
      return 7.5625 * t * t + 0.9375;
    }

    t -= 2.625 / 2.75;
    return 7.5625 * t * t + 0.984375;
  }
Provides a simple bouncing effect.

http://easings.net/#easeInBounce