Jump Squats Explanation

can any of you explain db squat jumps (4wave + 1jump).

basically the first 4 squats are quarter squats with a calf raise then a descend into a full squat and jump up

[quote]ballsofsteel wrote:
basically the first 4 squats are quarter squats with a calf raise then a descend into a full squat and jump up[/quote]

thanks buddy.