The second exercise that is being shown to help improve your explosion is the Tuck Jump or Knees to chest jump. The idea behind this exercise is to work the hips and make them explode as quickly as possible.
How to perform the jump is to get your feet shoulder width apart and squat down and then explode up as high and fast as possible. Once you are in the air bring your knees to the chest and then land back down in a squat position. The main focus is to make sure you bring your knees to the chest and not your chest to the knees.
You want to perform 3 sets of 8 reps, two times per week.
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