This is cluster bomb footage but DPICM works similarly.
http://www.youtube.com/watch?v=BMYnWTd8v8M
DPICM
http://www.globalsecurity.org/military/systems/munitions/dpicm.htm
Called "Steel Rain" by soldiers in the Gulf War, the M77 grenades are dispensed in mid-air above the target, drag-ribbon stabilized, and armed during free fall. Each warhead will saturate a target 200 meters in diameter, combining shaped-charge penetration and blast fragmentation.
DPICM has a significant submunition dud rate (2 to 5 percent depending on terrain), and that can slow free movement through an area into which DPICM has been fired.
In 1995 the Modified (MOD) Dual Purpose Improved Conventional Munitions (DPICM) Advanced Concept Technical Demonstration (ACTD) was initiated after the US Army identified a need to delay and disrupt multiple rocket launcher movement. A variant of the XM85 Self Destruct grenade carried by the ER-MLRS rocket, the MOD DPICM had its firing pin removed to keep the grenade from exploding on contact. The MOD DPICM incorporated a modified integrated chip providing a longer random delay in self destruct and an anti-disturbance sensor to prevent tampering or neutralization. A two-phase test program was developed.
Dual-purpose improved conventional munitions are base-ejection (155 mm only), payload-carrying projectiles. These projectiles are fired with M577 MT fuzes and are filled with 88 dual-purpose grenades. During flight, the base of the projectile is blown off and centrlfugal force disperses the grenades radially from the projectile line of flight.
The 155-mm DPICM projectile contains two types of dual-purpose grenades (64 M42 and 24 M46). Both types are capable of penetrating more than 2.5 inches of rolled homogeneous armor. They are also capable of fragmentation for incapacitating personnel. The M577 MT fuze is preset to function over the target area and initiate the expulsion charge. The expulsion charge pushes the grenades out of the container and onto the target area. The projectile can be modified for the SR mode. The SR mode causes the round to point detonate so as to be visible to the observer and destroy the submunitions. It also may produce an airburst for high-burst registrations.